add unit tests for diff suppress funcs (GoogleCloudPlatform#5050)

* add unit test for optionalPrefixSuppress

* add more unit tests

* add more diff suppress unit tests

* add new line

mmv1/third_party/terraform/utils/common_diff_suppress.go.erb

@@ -139,9 +139,9 @@ func locationDiffSuppressHelper(a, b string) bool {
 // For managed SSL certs, if new is an absolute FQDN (trailing '.') but old isn't, treat them as equals.
 func absoluteDomainSuppress(k, old, new string, _ *schema.ResourceData) bool {
 	if strings.HasPrefix(k, "managed.0.domains.") {
-		return old == strings.TrimRight(new, ".")
+		return old == strings.TrimRight(new, ".") || new == strings.TrimRight(old, ".")
 	}
-	return old == new
+	return false
 }
 
 func timestampDiffSuppress(format string) schema.SchemaDiffSuppressFunc {

mmv1/third_party/terraform/utils/common_diff_suppress_test.go.erb

@@ -0,0 +1,285 @@
+<% autogen_exception -%>
+// Contains common diff suppress functions.
+
+package google
+
+func TestOptionalPrefixSuppress(t *testing.T) {
+	cases := map[string]struct {
+		Old, New           string
+		Prefix             string
+		ExpectDiffSuppress bool
+	}{
+		"with same prefix": {
+			Old:                "my-folder",
+			New:                "folders/my-folder",
+			Prefix:             "folders/",
+			ExpectDiffSuppress: true,
+		},
+		"with different prefix": {
+			Old:                "folders/my-folder",
+			New:                "organizations/my-folder",
+			Prefix:             "folders/",
+			ExpectDiffSuppress: false,
+		},
+		"same without prefix": {
+			Old:                "my-folder",
+			New:                "my-folder",
+			Prefix:             "folders/",
+			ExpectDiffSuppress: false,
+		},
+		"different without prefix": {
+			Old:                "my-folder",
+			New:                "my-new-folder",
+			Prefix:             "folders/",
+			ExpectDiffSuppress: false,
+		},
+	}
+
+	for tn, tc := range cases {
+		if optionalPrefixSuppress(tc.Prefix)("folder", tc.Old, tc.New, nil) != tc.ExpectDiffSuppress {
+			t.Fatalf("bad: %s, '%s' => '%s' expect %t", tn, tc.Old, tc.New, tc.ExpectDiffSuppress)
+		}
+	}
+}
+
+func TestIgnoreMissingKeyInMap(t *testing.T) {
+	cases := map[string]struct {
+		Old, New           string
+		Key                string
+		ExpectDiffSuppress bool
+	}{
+		"missing key in map": {
+			Old:                "",
+			New:                "v1",
+			Key:                "x-goog-version",
+			ExpectDiffSuppress: true,
+		},
+		"different values": {
+			Old:                "v1",
+			New:                "v2",
+			Key:                "x-goog-version",
+			ExpectDiffSuppress: false,
+		},
+		"same values": {
+			Old:                "v1",
+			New:                "v1",
+			Key:                "x-goog-version",
+			ExpectDiffSuppress: false,
+		},
+	}
+
+	for tn, tc := range cases {
+		if ignoreMissingKeyInMap(tc.Key)("push_config.0.attributes."+tc.Key, tc.Old, tc.New, nil) != tc.ExpectDiffSuppress {
+			t.Fatalf("bad: %s, '%s' => '%s' expect %t", tn, tc.Old, tc.New, tc.ExpectDiffSuppress)
+		}
+	}
+}
+
+func TestOptionalSurroundingSpacesSuppress(t *testing.T) {
+	cases := map[string]struct {
+		Old, New           string
+		ExpectDiffSuppress bool
+	}{
+		"surrounding spaces": {
+			Old:                "value",
+			New:                " value ",
+			ExpectDiffSuppress: true,
+		},
+		"no surrounding spaces": {
+			Old:                "value",
+			New:                "value",
+			ExpectDiffSuppress: true,
+		},
+		"one space each": {
+			Old:                " value",
+			New:                "value ",
+			ExpectDiffSuppress: true,
+		},
+		"different values": {
+			Old:                " different",
+			New:                "values ",
+			ExpectDiffSuppress: false,
+		},
+	}
+
+	for tn, tc := range cases {
+		if optionalSurroundingSpacesSuppress("filter", tc.Old, tc.New, nil) != tc.ExpectDiffSuppress {
+			t.Fatalf("bad: %s, '%s' => '%s' expect %t", tn, tc.Old, tc.New, tc.ExpectDiffSuppress)
+		}
+	}
+}
+
+func TestCaseDiffSuppress(t *testing.T) {
+	cases := map[string]struct {
+		Old, New           string
+		ExpectDiffSuppress bool
+	}{
+		"differents cases": {
+			Old:                "Value",
+			New:                "value",
+			ExpectDiffSuppress: true,
+		},
+		"different values": {
+			Old:                "value",
+			New:                "NewValue",
+			ExpectDiffSuppress: false,
+		},
+		"same cases": {
+			Old:                "value",
+			New:                "value",
+			ExpectDiffSuppress: true,
+		},
+	}
+
+	for tn, tc := range cases {
+		if caseDiffSuppress("key", tc.Old, tc.New, nil) != tc.ExpectDiffSuppress {
+			t.Fatalf("bad: %s, '%s' => '%s' expect %t", tn, tc.Old, tc.New, tc.ExpectDiffSuppress)
+		}
+	}
+}
+
+func TestPortRangeDiffSuppress(t *testing.T) {
+	cases := map[string]struct {
+		Old, New           string
+		ExpectDiffSuppress bool
+	}{
+		"different single values": {
+			Old:                "80-80",
+			New:                "443",
+			ExpectDiffSuppress: false,
+		},
+		"different ranges": {
+			Old:                "80-80",
+			New:                "443-444",
+			ExpectDiffSuppress: false,
+		},
+		"same single values": {
+			Old:                "80-80",
+			New:                "80",
+			ExpectDiffSuppress: true,
+		},
+		"same ranges": {
+			Old:                "80-80",
+			New:                "80-80",
+			ExpectDiffSuppress: false,
+		},
+	}
+
+	for tn, tc := range cases {
+		if portRangeDiffSuppress("ports", tc.Old, tc.New, nil) != tc.ExpectDiffSuppress {
+			t.Fatalf("bad: %s, '%s' => '%s' expect %t", tn, tc.Old, tc.New, tc.ExpectDiffSuppress)
+		}
+	}
+}
+
+func TestLocationDiffSuppress(t *testing.T) {
+	cases := map[string]struct {
+		Old, New           string
+		ExpectDiffSuppress bool
+	}{
+		"locations to zones": {
+			Old:                "projects/x/locations/y/resource/z",
+			New:                "projects/x/zones/y/resource/z",
+			ExpectDiffSuppress: true,
+		},
+		"regions to locations": {
+			Old:                "projects/x/regions/y/resource/z",
+			New:                "projects/x/locations/y/resource/z",
+			ExpectDiffSuppress: true,
+		},
+		"locations to locations": {
+			Old:                "projects/x/locations/y/resource/z",
+			New:                "projects/x/locations/y/resource/z",
+			ExpectDiffSuppress: false,
+		},
+		"zones to regions": {
+			Old:                "projects/x/zones/y/resource/z",
+			New:                "projects/x/regions/y/resource/z",
+			ExpectDiffSuppress: false,
+		},
+		"different locations": {
+			Old:                "projects/x/locations/a/resource/z",
+			New:                "projects/x/locations/b/resource/z",
+			ExpectDiffSuppress: false,
+		},
+	}
+
+	for tn, tc := range cases {
+		if locationDiffSuppress("policy_uri", tc.Old, tc.New, nil) != tc.ExpectDiffSuppress {
+			t.Fatalf("bad: %s, '%s' => '%s' expect %t", tn, tc.Old, tc.New, tc.ExpectDiffSuppress)
+		}
+	}
+}
+
+func TestAbsoluteDomainSuppress(t *testing.T) {
+	cases := map[string]struct {
+		Old, New           string
+		ExpectDiffSuppress bool
+	}{
+		"new trailing dot": {
+			Old:                "sslcert.tf-test.club",
+			New:                "sslcert.tf-test.club.",
+			ExpectDiffSuppress: true,
+		},
+		"old trailing dot": {
+			Old:                "sslcert.tf-test.club.",
+			New:                "sslcert.tf-test.club",
+			ExpectDiffSuppress: true,
+		},
+		"same trailing dot": {
+			Old:                "sslcert.tf-test.club.",
+			New:                "sslcert.tf-test.club.",
+			ExpectDiffSuppress: false,
+		},
+		"different trailing dot": {
+			Old:                "sslcert.tf-test.club.",
+			New:                "sslcert.tf-test.clubs.",
+			ExpectDiffSuppress: false,
+		},
+		"different no trailing dot": {
+			Old:                "sslcert.tf-test.club",
+			New:                "sslcert.tf-test.clubs",
+			ExpectDiffSuppress: false,
+		},
+	}
+
+	for tn, tc := range cases {
+		if absoluteDomainSuppress("managed.0.domains.", tc.Old, tc.New, nil) != tc.ExpectDiffSuppress {
+			t.Fatalf("bad: %s, '%s' => '%s' expect %t", tn, tc.Old, tc.New, tc.ExpectDiffSuppress)
+		}
+	}
+}
+
+func TestDurationDiffSuppress(t *testing.T) {
+	cases := map[string]struct {
+		Old, New           string
+		ExpectDiffSuppress bool
+	}{
+		"different values": {
+			Old:                "60s",
+			New:                "65s",
+			ExpectDiffSuppress: false,
+		},
+		"same values": {
+			Old:                "60s",
+			New:                "60s",
+			ExpectDiffSuppress: true,
+		},
+		"different values, different formats": {
+			Old:                "65s",
+			New:                "60.0s",
+			ExpectDiffSuppress: false,
+		},
+		"same values, different formats": {
+			Old:                "60.0s",
+			New:                "60s",
+			ExpectDiffSuppress: true,
+		},
+	}
+
+	for tn, tc := range cases {
+		if durationDiffSuppress("duration", tc.Old, tc.New, nil) != tc.ExpectDiffSuppress {
+			t.Fatalf("bad: %s, '%s' => '%s' expect %t", tn, tc.Old, tc.New, tc.ExpectDiffSuppress)
+		}
+	}
+}