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Merge pull request #250 from perillo/improve-test-coverage-2

Browse source 
Improve test coverage
This commit is contained in:
Chris Boesch 2023-04-24 15:56:51 +00:00 committed by GitHub
commit 752efd891d
2 changed files with 270 additions and 57 deletions
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46
build.zig
View file

@ -18,7 +18,8 @@ pub const Exercise = struct {
main_file: []const u8,
/// This is the desired output of the program.
/// A program passes if its output ends with this string.
/// A program passes if its output, excluding trailing whitespace, is equal
/// to this string.
output: []const u8,
/// This is an optional hint to give if the program does not succeed.
@ -365,7 +366,7 @@ const exercises = [_]Exercise{
},
.{
.main_file = "068_comptime3.zig",
.output = "Minnow (1:32, 4 x 2)\nShark (1:16, 8 x 5)\nWhale (1:1, 143 x 95)\n",
.output = "Minnow (1:32, 4 x 2)\nShark (1:16, 8 x 5)\nWhale (1:1, 143 x 95)",
},
.{
.main_file = "069_comptime4.zig",
@ -516,7 +517,7 @@ const exercises = [_]Exercise{
},
.{
.main_file = "099_formatting.zig",
.output = "\n X | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 \n---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+\n 1 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 \n\n 2 | 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 \n\n 3 | 3 6 9 12 15 18 21 24 27 30 33 36 39 42 45 \n\n 4 | 4 8 12 16 20 24 28 32 36 40 44 48 52 56 60 \n\n 5 | 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 \n\n 6 | 6 12 18 24 30 36 42 48 54 60 66 72 78 84 90 \n\n 7 | 7 14 21 28 35 42 49 56 63 70 77 84 91 98 105 \n\n 8 | 8 16 24 32 40 48 56 64 72 80 88 96 104 112 120 \n\n 9 | 9 18 27 36 45 54 63 72 81 90 99 108 117 126 135 \n\n10 | 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 \n\n11 | 11 22 33 44 55 66 77 88 99 110 121 132 143 154 165 \n\n12 | 12 24 36 48 60 72 84 96 108 120 132 144 156 168 180 \n\n13 | 13 26 39 52 65 78 91 104 117 130 143 156 169 182 195 \n\n14 | 14 28 42 56 70 84 98 112 126 140 154 168 182 196 210 \n\n15 | 15 30 45 60 75 90 105 120 135 150 165 180 195 210 225 \n\n",
.output = "\n X | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 \n---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+\n 1 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 \n\n 2 | 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 \n\n 3 | 3 6 9 12 15 18 21 24 27 30 33 36 39 42 45 \n\n 4 | 4 8 12 16 20 24 28 32 36 40 44 48 52 56 60 \n\n 5 | 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 \n\n 6 | 6 12 18 24 30 36 42 48 54 60 66 72 78 84 90 \n\n 7 | 7 14 21 28 35 42 49 56 63 70 77 84 91 98 105 \n\n 8 | 8 16 24 32 40 48 56 64 72 80 88 96 104 112 120 \n\n 9 | 9 18 27 36 45 54 63 72 81 90 99 108 117 126 135 \n\n10 | 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 \n\n11 | 11 22 33 44 55 66 77 88 99 110 121 132 143 154 165 \n\n12 | 12 24 36 48 60 72 84 96 108 120 132 144 156 168 180 \n\n13 | 13 26 39 52 65 78 91 104 117 130 143 156 169 182 195 \n\n14 | 14 28 42 56 70 84 98 112 126 140 154 168 182 196 210 \n\n15 | 15 30 45 60 75 90 105 120 135 150 165 180 195 210 225",
},
.{
.main_file = "999_the_end.zig",
@ -758,20 +759,20 @@ const ZiglingStep = struct {
return err;
};
// Allow up to 1 MB of stdout capture
// Allow up to 1 MB of stdout capture.
const max_output_len = 1 * 1024 * 1024;
const output = if (self.exercise.check_stdout)
try child.stdout.?.reader().readAllAlloc(self.builder.allocator, max_output_len)
else
try child.stderr.?.reader().readAllAlloc(self.builder.allocator, max_output_len);
// at this point stdout is closed, wait for the process to terminate
// At this point stdout is closed, wait for the process to terminate.
const term = child.wait() catch |err| {
print("{s}Unable to spawn {s}: {s}{s}\n", .{ red_text, argv[0], @errorName(err), reset_text });
return err;
};
// make sure it exited cleanly.
// Make sure it exited cleanly.
switch (term) {
.Exited => |code| {
if (code != 0) {
@ -785,10 +786,10 @@ const ZiglingStep = struct {
},
}
// validate the output
// Validate the output.
const trimOutput = std.mem.trimRight(u8, output, " \r\n");
const trimExerciseOutput = std.mem.trimRight(u8, self.exercise.output, " \r\n");
if (std.mem.indexOf(u8, trimOutput, trimExerciseOutput) == null or trimOutput.len != trimExerciseOutput.len) {
if (!std.mem.eql(u8, trimOutput, trimExerciseOutput)) {
print(
\\
\\{s}----------- Expected this output -----------{s}
@ -801,7 +802,7 @@ const ZiglingStep = struct {
return error.InvalidOutput;
}
print("{s}PASSED:\n{s}{s}\n", .{ green_text, output, reset_text });
print("{s}PASSED:\n{s}{s}\n\n", .{ green_text, trimOutput, reset_text });
}
// The normal compile step calls os.exit, so we can't use it as a library :(
@ -1057,18 +1058,31 @@ const SkipStep = struct {
}
};
// Check that each exercise number, excluding the last, forms the sequence `[1, exercise.len)`.
// Check that each exercise number, excluding the last, forms the sequence
// `[1, exercise.len)`.
//
// Additionally check that the output field does not contain trailing whitespace.
fn validate_exercises() bool {
// Don't use the "multi-object for loop" syntax, in order to avoid a syntax error with old Zig
// compilers.
// Don't use the "multi-object for loop" syntax, in order to avoid a syntax
// error with old Zig compilers.
var i: usize = 0;
for (exercises[0 .. exercises.len - 1]) |ex| {
i += 1;
if (ex.number() != i) {
print(
"exercise {s} has an incorrect number: expected {}, got {s}\n",
.{ ex.main_file, i, ex.key() },
);
print("exercise {s} has an incorrect number: expected {}, got {s}\n", .{
ex.main_file,
i,
ex.key(),
});
return false;
}
const output = std.mem.trimRight(u8, ex.output, " \r\n");
if (output.len != ex.output.len) {
print("exercise {s} output field has extra trailing whitespace\n", .{
ex.main_file,
});
return false;
}

281
test/tests.zig
View file

@ -2,11 +2,16 @@ const std = @import("std");
const root = @import("../build.zig");
const debug = std.debug;
const fmt = std.fmt;
const fs = std.fs;
const mem = std.mem;
const Allocator = std.mem.Allocator;
const Build = std.build;
const Step = Build.Step;
const FileSource = std.Build.FileSource;
const Reader = fs.File.Reader;
const RunStep = std.Build.RunStep;
const Step = Build.Step;
const Exercise = root.Exercise;
@ -18,30 +23,27 @@ pub fn addCliTests(b: *std.Build, exercises: []const Exercise) *Step {
const outdir = "patches/healed";
fs.cwd().makePath(outdir) catch |err| {
debug.print("unable to make '{s}': {s}\n", .{ outdir, @errorName(err) });
return step;
return fail(step, "unable to make '{s}': {s}\n", .{ outdir, @errorName(err) });
};
heal(b.allocator, exercises, outdir) catch |err| {
return fail(step, "unable to heal exercises: {s}\n", .{@errorName(err)});
};
{
// Test that `zig build -Dhealed -Dn=n test` selects the nth exercise.
const case_step = createCase(b, "case-1");
// Test that `zig build -Dn=n -Dhealed test` selects the nth exercise.
var i: usize = 0;
for (exercises[0 .. exercises.len - 1]) |ex| {
i += 1;
if (ex.skip) continue;
const patch = PatchStep.create(b, ex, outdir);
const cmd = b.addSystemCommand(
&.{ b.zig_exe, "build", b.fmt("-Dn={}", .{i}), "-Dhealed", "test" },
&.{ b.zig_exe, "build", "-Dhealed", b.fmt("-Dn={}", .{i}), "test" },
);
cmd.setName(b.fmt("zig build -D={} -Dhealed test", .{i}));
cmd.setName(b.fmt("zig build -Dhealed -Dn={} test", .{i}));
cmd.expectExitCode(0);
cmd.step.dependOn(&patch.step);
// Some exercise output has an extra space character.
if (ex.check_stdout)
expectStdOutMatch(cmd, ex.output)
else
@ -54,18 +56,18 @@ pub fn addCliTests(b: *std.Build, exercises: []const Exercise) *Step {
}
{
// Test that `zig build -Dhealed -Dn=n test` skips disabled esercises.
const case_step = createCase(b, "case-2");
// Test that `zig build -Dn=n -Dhealed test` skips disabled esercises.
var i: usize = 0;
for (exercises[0 .. exercises.len - 1]) |ex| {
i += 1;
if (!ex.skip) continue;
const cmd = b.addSystemCommand(
&.{ b.zig_exe, "build", b.fmt("-Dn={}", .{i}), "-Dhealed", "test" },
&.{ b.zig_exe, "build", "-Dhealed", b.fmt("-Dn={}", .{i}), "test" },
);
cmd.setName(b.fmt("zig build -D={} -Dhealed test", .{i}));
cmd.setName(b.fmt("zig build -Dhealed -Dn={} test", .{i}));
cmd.expectExitCode(0);
cmd.expectStdOutEqual("");
expectStdErrMatch(cmd, b.fmt("{s} skipped", .{ex.main_file}));
@ -76,8 +78,63 @@ pub fn addCliTests(b: *std.Build, exercises: []const Exercise) *Step {
step.dependOn(case_step);
}
const cleanup = b.addRemoveDirTree(outdir);
step.dependOn(&cleanup.step);
{
// Test that `zig build -Dhealed` process all the exercises in order.
const case_step = createCase(b, "case-3");
// TODO: when an exercise is modified, the cache is not invalidated.
const cmd = b.addSystemCommand(&.{ b.zig_exe, "build", "-Dhealed" });
cmd.setName("zig build -Dhealed");
cmd.expectExitCode(0);
const stderr = cmd.captureStdErr();
const verify = CheckStep.create(b, exercises, stderr, true);
verify.step.dependOn(&cmd.step);
case_step.dependOn(&verify.step);
step.dependOn(case_step);
}
{
// Test that `zig build -Dhealed -Dn=1 start` process all the exercises
// in order.
const case_step = createCase(b, "case-4");
// TODO: when an exercise is modified, the cache is not invalidated.
const cmd = b.addSystemCommand(
&.{ b.zig_exe, "build", "-Dhealed", "-Dn=1", "start" },
);
cmd.setName("zig build -Dhealed -Dn=1 start");
cmd.expectExitCode(0);
const stderr = cmd.captureStdErr();
const verify = CheckStep.create(b, exercises, stderr, false);
verify.step.dependOn(&cmd.step);
case_step.dependOn(&verify.step);
step.dependOn(case_step);
}
{
// Test that `zig build -Dn=1` prints the hint.
const case_step = createCase(b, "case-5");
const cmd = b.addSystemCommand(&.{ b.zig_exe, "build", "-Dn=1" });
cmd.setName("zig build -Dn=1");
cmd.expectExitCode(1);
expectStdErrMatch(cmd, exercises[0].hint);
case_step.dependOn(&cmd.step);
step.dependOn(case_step);
}
// Don't add the cleanup step, since it may delete outdir while a test case
// is running.
//const cleanup = b.addRemoveDirTree(outdir);
//step.dependOn(&cleanup.step);
return step;
}
@ -93,28 +150,30 @@ fn createCase(b: *Build, name: []const u8) *Step {
return case_step;
}
// Apply a patch to the specified exercise.
const PatchStep = struct {
const join = fs.path.join;
const exercises_path = "exercises";
const patches_path = "patches/patches";
// Check the output of `zig build` or `zig build -Dn=1 start`.
const CheckStep = struct {
step: Step,
exercise: Exercise,
outdir: []const u8,
exercises: []const Exercise,
stderr: FileSource,
has_logo: bool,
pub fn create(owner: *Build, exercise: Exercise, outdir: []const u8) *PatchStep {
const self = owner.allocator.create(PatchStep) catch @panic("OOM");
pub fn create(
owner: *Build,
exercises: []const Exercise,
stderr: FileSource,
has_logo: bool,
) *CheckStep {
const self = owner.allocator.create(CheckStep) catch @panic("OOM");
self.* = .{
.step = Step.init(.{
.id = .custom,
.name = owner.fmt("patch {s}", .{exercise.main_file}),
.name = "check",
.owner = owner,
.makeFn = make,
}),
.exercise = exercise,
.outdir = outdir,
.exercises = exercises,
.stderr = stderr,
.has_logo = has_logo,
};
return self;
@ -122,25 +181,165 @@ const PatchStep = struct {
fn make(step: *Step, _: *std.Progress.Node) !void {
const b = step.owner;
const self = @fieldParentPtr(PatchStep, "step", step);
const exercise = self.exercise;
const name = exercise.baseName();
const self = @fieldParentPtr(CheckStep, "step", step);
const exercises = self.exercises;
const stderr_file = try fs.cwd().openFile(
self.stderr.getPath(b),
.{ .mode = .read_only },
);
defer stderr_file.close();
const stderr = stderr_file.reader();
for (exercises) |ex| {
if (ex.number() == 1 and self.has_logo) {
// Skip the logo.
var buf: [80]u8 = undefined;
var lineno: usize = 0;
while (lineno < 8) : (lineno += 1) {
_ = try readLine(stderr, &buf);
}
}
try check_output(step, ex, stderr);
}
}
fn check_output(step: *Step, exercise: Exercise, reader: Reader) !void {
const b = step.owner;
var buf: [1024]u8 = undefined;
if (exercise.skip) {
{
const actual = try readLine(reader, &buf) orelse "EOF";
const expect = b.fmt("Skipping {s}", .{exercise.main_file});
try check(step, exercise, expect, actual);
}
{
const actual = try readLine(reader, &buf) orelse "EOF";
try check(step, exercise, "", actual);
}
return;
}
{
const actual = try readLine(reader, &buf) orelse "EOF";
const expect = b.fmt("Compiling {s}...", .{exercise.main_file});
try check(step, exercise, expect, actual);
}
{
const actual = try readLine(reader, &buf) orelse "EOF";
const expect = b.fmt("Checking {s}...", .{exercise.main_file});
try check(step, exercise, expect, actual);
}
{
const actual = try readLine(reader, &buf) orelse "EOF";
const expect = "PASSED:";
try check(step, exercise, expect, actual);
}
// Skip the exercise output.
const nlines = 1 + mem.count(u8, exercise.output, "\n") + 1;
var lineno: usize = 0;
while (lineno < nlines) : (lineno += 1) {
_ = try readLine(reader, &buf) orelse @panic("EOF");
}
}
fn check(
step: *Step,
exercise: Exercise,
expect: []const u8,
actual: []const u8,
) !void {
if (!mem.eql(u8, expect, actual)) {
return step.fail("{s}: expected to see \"{s}\", found \"{s}\"", .{
exercise.main_file,
expect,
actual,
});
}
}
fn readLine(reader: fs.File.Reader, buf: []u8) !?[]const u8 {
if (try reader.readUntilDelimiterOrEof(buf, '\n')) |line| {
return mem.trimRight(u8, line, " \r\n");
}
return null;
}
};
// A step that will fail.
const FailStep = struct {
step: Step,
error_msg: []const u8,
pub fn create(owner: *Build, error_msg: []const u8) *FailStep {
const self = owner.allocator.create(FailStep) catch @panic("OOM");
self.* = .{
.step = Step.init(.{
.id = .custom,
.name = "fail",
.owner = owner,
.makeFn = make,
}),
.error_msg = error_msg,
};
return self;
}
fn make(step: *Step, _: *std.Progress.Node) !void {
const b = step.owner;
const self = @fieldParentPtr(FailStep, "step", step);
try step.result_error_msgs.append(b.allocator, self.error_msg);
return error.MakeFailed;
}
};
// A variant of `std.Build.Step.fail` that does not return an error so that it
// can be used in the configuration phase. It returns a FailStep, so that the
// error will be cleanly handled by the build runner.
fn fail(step: *Step, comptime format: []const u8, args: anytype) *Step {
const b = step.owner;
const fail_step = FailStep.create(b, b.fmt(format, args));
step.dependOn(&fail_step.step);
return step;
}
// Heals all the exercises.
fn heal(allocator: Allocator, exercises: []const Exercise, outdir: []const u8) !void {
const join = fs.path.join;
const exercises_path = "exercises";
const patches_path = "patches/patches";
for (exercises) |ex| {
const name = ex.baseName();
// Use the POSIX patch variant.
const file = join(b.allocator, &.{ exercises_path, exercise.main_file }) catch
@panic("OOM");
const patch = join(b.allocator, &.{ patches_path, b.fmt("{s}.patch", .{name}) }) catch
@panic("OOM");
const output = join(b.allocator, &.{ self.outdir, exercise.main_file }) catch
@panic("OOM");
const file = try join(allocator, &.{ exercises_path, ex.main_file });
const patch = b: {
const patch_name = try fmt.allocPrint(allocator, "{s}.patch", .{name});
break :b try join(allocator, &.{ patches_path, patch_name });
};
const output = try join(allocator, &.{ outdir, ex.main_file });
const argv = &.{ "patch", "-i", patch, "-o", output, file };
var child = std.process.Child.init(argv, b.allocator);
var child = std.process.Child.init(argv, allocator);
child.stdout_behavior = .Ignore; // the POSIX standard says that stdout is not used
_ = try child.spawnAndWait();
}
};
}
//
// Missing functions from std.Build.RunStep