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diff_test.go
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package diff_test
import (
"os"
"path/filepath"
"testing"
"oss.terrastruct.com/util-go/assert"
"oss.terrastruct.com/util-go/diff"
)
func TestTestData(t *testing.T) {
t.Run("TESTDATA_ACCEPT", testTestDataAccept)
os.Unsetenv("TESTDATA_ACCEPT")
os.Unsetenv("TA")
m1 := map[string]interface{}{
"one": 1,
"two": 2,
"three": 3,
"four": 4,
"five": map[string]interface{}{
"yes": "yes",
"no": "yes",
"five": map[string]interface{}{
"yes": "no",
"no": "yes",
},
},
}
err := os.Remove("testdata/TestTestData.exp.json")
if err != nil && !os.IsNotExist(err) {
t.Fatalf("unexpected error: %v", err)
}
err = diff.TestdataJSON(filepath.Join("testdata", t.Name()), m1)
assert.Error(t, err)
exp := `diff (rerun with $TESTDATA_ACCEPT=1 or $TA=1 to accept):
[1m--- /dev/null[m
[1m+++ b/testdata/TestTestData.got.json[m
[36m@@ -0,0 +1,14 @@[m
[32m+[m[32m{[m
[32m+[m[32m "five": {[m
[32m+[m[32m "five": {[m
[32m+[m[32m "no": "yes",[m
[32m+[m[32m "yes": "no"[m
[32m+[m[32m },[m
[32m+[m[32m "no": "yes",[m
[32m+[m[32m "yes": "yes"[m
[32m+[m[32m },[m
[32m+[m[32m "four": 4,[m
[32m+[m[32m "one": 1,[m
[32m+[m[32m "three": 3,[m
[32m+[m[32m "two": 2[m
[32m+[m[32m}[m`
got := err.Error()
ds, err := diff.Strings(exp, got)
if err != nil {
t.Fatalf("unable to generate exp diff: %v", err)
}
if ds != "" {
t.Fatalf("expected no diff:\n%s", ds)
}
err = diff.Runes(exp, got)
if err != nil {
t.Fatalf("expected no rune diff: %v", err)
}
err = os.Rename("testdata/TestTestData.got.json", "testdata/TestTestData.exp.json")
assert.Success(t, err)
m1["five"].(map[string]interface{})["five"].(map[string]interface{})["no"] = "ys"
err = diff.TestdataJSON(filepath.Join("testdata", t.Name()), m1)
if err == nil {
t.Fatalf("expected err: %#v", err)
}
exp = `diff (rerun with $TESTDATA_ACCEPT=1 or $TA=1 to accept):
[1m--- a/testdata/TestTestData.exp.json[m
[1m+++ b/testdata/TestTestData.got.json[m
[36m@@ -1,7 +1,7 @@[m
[m{[m
[m "five": {[m
[m "five": {[m
[31m-[m[31m "no": "yes",[m
[32m+[m[32m "no": "ys",[m
[m "yes": "no"[m
[m },[m
[m "no": "yes",[m`
got = err.Error()
ds, err = diff.Strings(exp, got)
assert.Success(t, err)
if ds != "" {
t.Fatalf("expected no diff:\n%s", ds)
}
exp += "a"
ds, err = diff.Strings(exp, got)
assert.Success(t, err)
if ds == "" {
t.Fatalf("expected incorrect diff:\n%s", ds)
}
err = diff.Runes(exp, got)
assert.Error(t, err)
}
func testTestDataAccept(t *testing.T) {
m1 := map[string]interface{}{
"one": 1,
}
os.Setenv("TESTDATA_ACCEPT", "1")
os.Setenv("TA", "1")
err := diff.TestdataJSON(filepath.Join("testdata", t.Name()), m1)
assert.Success(t, err)
m1["one"] = 2
os.Setenv("TESTDATA_ACCEPT", "")
os.Setenv("TA", "")
err = diff.TestdataJSON(filepath.Join("testdata", t.Name()), m1)
assert.Error(t, err)
exp := `diff (rerun with $TESTDATA_ACCEPT=1 or $TA=1 to accept):
[1m--- a/testdata/TestTestData/TESTDATA_ACCEPT.exp.json[m
[1m+++ b/testdata/TestTestData/TESTDATA_ACCEPT.got.json[m
[36m@@ -1,3 +1,3 @@[m
[m{[m
[31m-[m[31m "one": 1[m
[32m+[m[32m "one": 2[m
[m}[m`
ds, err := diff.Strings(exp, err.Error())
assert.Success(t, err)
if ds != "" {
t.Fatalf("expected no diff:\n%s", ds)
}
err = os.Remove(filepath.Join("testdata", t.Name()) + ".got.json")
assert.Success(t, err)
}