main_test.go

     1  // Copyright 2026 The Go Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  package main
     6  
     7  import (
     8  	"bytes"
     9  	"os"
    10  	"path/filepath"
    11  	"testing"
    12  )
    13  
    14  // TestPlanConsistent checks SPEC-TRANSITION.md against itself. The document
    15  // states its dependencies three times -- Part 3's table, Part 4's
    16  // "Needs:"/"Prefers:" lines, and Part 4's "Blocks:" lines, which are the same
    17  // edges reversed -- and this is what keeps the three from drifting. It also
    18  // checks that the table is topologically sorted (treating Prefers as edges),
    19  // that unrelated tasks are ordered by track, and that every task is in exactly
    20  // one track.
    21  //
    22  // This runs on the checked-in document rather than on a fixture, because the
    23  // checked-in document is the thing that has to be right.
    24  func TestPlanConsistent(t *testing.T) {
    25  	md, _ := paths("")
    26  	for _, p := range load(md).problems() {
    27  		t.Errorf("%s: %s", filepath.Base(md), p)
    28  	}
    29  }
    30  
    31  // TestGraphUpToDate checks that SPEC-TASKS.dot still matches the document it
    32  // was generated from, so that editing the plan without regenerating is caught
    33  // here rather than noticed later in a stale picture.
    34  func TestGraphUpToDate(t *testing.T) {
    35  	md, dotPath := paths("")
    36  	var want bytes.Buffer
    37  	load(md).dot(&want)
    38  
    39  	got, err := os.ReadFile(dotPath)
    40  	if err != nil {
    41  		t.Fatal(err)
    42  	}
    43  	if !bytes.Equal(got, want.Bytes()) {
    44  		t.Errorf("%s is out of date; regenerate with:\n\tgo run ./cmd/spectasks -w",
    45  			filepath.Base(dotPath))
    46  	}
    47  }
    48
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