Replace all the various (-want, +got) styles with a single format

pkg/apis/config/default_test.go

@@ -22,6 +22,7 @@ import (
 	"github.com/google/go-cmp/cmp"
 	"github.com/tektoncd/pipeline/pkg/apis/pipeline/pod"
 	test "github.com/tektoncd/pipeline/pkg/reconciler/testing"
+	"github.com/tektoncd/pipeline/test/diff"
 )
 
 func TestNewDefaultsFromConfigMap(t *testing.T) {
@@ -186,7 +187,7 @@ func verifyConfigFileWithExpectedConfig(t *testing.T, fileName string, expectedC
 	cm := test.ConfigMapFromTestFile(t, fileName)
 	if Defaults, err := NewDefaultsFromConfigMap(cm); err == nil {
 		if d := cmp.Diff(Defaults, expectedConfig); d != "" {
-			t.Errorf("Diff:\n%s", d)
+			t.Errorf("Diff:\n%s", diff.PrintWantGot(d))
 		}
 	} else {
 		t.Errorf("NewDefaultsFromConfigMap(actual) = %v", err)

pkg/apis/config/store_test.go

@@ -22,6 +22,7 @@ import (
 
 	"github.com/google/go-cmp/cmp"
 	test "github.com/tektoncd/pipeline/pkg/reconciler/testing"
+	"github.com/tektoncd/pipeline/test/diff"
 	logtesting "knative.dev/pkg/logging/testing"
 )
 
@@ -33,7 +34,7 @@ func TestStoreLoadWithContext(t *testing.T) {
 	config := FromContext(store.ToContext(context.Background()))
 
 	expected, _ := NewDefaultsFromConfigMap(defaultConfig)
-	if diff := cmp.Diff(config.Defaults, expected); diff != "" {
-		t.Errorf("Unexpected default config (-want, +got): %v", diff)
+	if d := cmp.Diff(config.Defaults, expected); d != "" {
+		t.Errorf("Unexpected default config %s", diff.PrintWantGot(d))
 	}
 }

pkg/apis/pipeline/v1alpha1/cluster_task_conversion_test.go

@@ -23,6 +23,7 @@ import (
 	"github.com/google/go-cmp/cmp"
 	"github.com/tektoncd/pipeline/pkg/apis/pipeline/v1beta1"
 	resource "github.com/tektoncd/pipeline/pkg/apis/resource/v1alpha1"
+	"github.com/tektoncd/pipeline/test/diff"
 	corev1 "k8s.io/api/core/v1"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	"knative.dev/pkg/apis"
@@ -175,8 +176,8 @@ func TestClusterTaskConversion(t *testing.T) {
 					t.Errorf("ConvertFrom() = %v", err)
 				}
 				t.Logf("ConvertFrom() = %#v", got)
-				if diff := cmp.Diff(test.in, got); diff != "" {
-					t.Errorf("roundtrip (-want, +got) = %v", diff)
+				if d := cmp.Diff(test.in, got); d != "" {
+					t.Errorf("roundtrip %s", diff.PrintWantGot(d))
 				}
 			})
 		}
@@ -312,8 +313,8 @@ func TestClusterTaskConversionFromDeprecated(t *testing.T) {
 					t.Errorf("ConvertFrom() = %v", err)
 				}
 				t.Logf("ConvertFrom() = %#v", got)
-				if diff := cmp.Diff(test.want, got); diff != "" {
-					t.Errorf("roundtrip (-want, +got) = %v", diff)
+				if d := cmp.Diff(test.want, got); d != "" {
+					t.Errorf("roundtrip %s", diff.PrintWantGot(d))
 				}
 			})
 		}

pkg/apis/pipeline/v1alpha1/condition_defaults_test.go

@@ -23,6 +23,7 @@ import (
 	"github.com/google/go-cmp/cmp"
 	tb "github.com/tektoncd/pipeline/internal/builder/v1alpha1"
 	"github.com/tektoncd/pipeline/pkg/apis/pipeline/v1alpha1"
+	"github.com/tektoncd/pipeline/test/diff"
 )
 
 func TestConditionSpec_SetDefaults(t *testing.T) {
@@ -90,8 +91,8 @@ func TestConditionSpec_SetDefaults(t *testing.T) {
 		t.Run(tc.name, func(t *testing.T) {
 			ctx := context.Background()
 			tc.input.SetDefaults(ctx)
-			if diff := cmp.Diff(tc.output, tc.input); diff != "" {
-				t.Errorf("Mismatch of PipelineRunSpec: %s", diff)
+			if d := cmp.Diff(tc.output, tc.input); d != "" {
+				t.Errorf("Mismatch of PipelineRunSpec: %s", diff.PrintWantGot(d))
 			}
 		})
 	}

pkg/apis/pipeline/v1alpha1/condition_validation_test.go

@@ -24,6 +24,7 @@ import (
 	"github.com/google/go-cmp/cmp/cmpopts"
 	tb "github.com/tektoncd/pipeline/internal/builder/v1alpha1"
 	"github.com/tektoncd/pipeline/pkg/apis/pipeline/v1alpha1"
+	"github.com/tektoncd/pipeline/test/diff"
 	"knative.dev/pkg/apis"
 )
 
@@ -92,7 +93,7 @@ func TestCondition_Invalidate(t *testing.T) {
 				t.Fatalf("Expected an Error, got nothing for %v", tc)
 			}
 			if d := cmp.Diff(tc.expectedError, *err, cmpopts.IgnoreUnexported(apis.FieldError{})); d != "" {
-				t.Errorf("Condition.Validate() errors diff -want, +got: %v", d)
+				t.Errorf("Condition.Validate() errors diff %s", diff.PrintWantGot(d))
 			}
 		})
 	}

pkg/apis/pipeline/v1alpha1/container_replacements_test.go

@@ -21,6 +21,7 @@ import (
 
 	"github.com/google/go-cmp/cmp"
 	"github.com/tektoncd/pipeline/pkg/apis/pipeline/v1alpha1"
+	"github.com/tektoncd/pipeline/test/diff"
 	corev1 "k8s.io/api/core/v1"
 )
 
@@ -121,7 +122,7 @@ func TestApplyContainerReplacements(t *testing.T) {
 
 	v1alpha1.ApplyContainerReplacements(&s, replacements, arrayReplacements)
 	if d := cmp.Diff(s, expected); d != "" {
-		t.Errorf("Container replacements failed: %s", d)
+		t.Errorf("Container replacements failed: %s", diff.PrintWantGot(d))
 	}
 }
 
@@ -142,6 +143,6 @@ func TestApplyContainerReplacements_NotDefined(t *testing.T) {
 	}
 	v1alpha1.ApplyContainerReplacements(&s, replacements, arrayReplacements)
 	if d := cmp.Diff(s, expected); d != "" {
-		t.Errorf("Unexpected container replacement: %s", d)
+		t.Errorf("Unexpected container replacement: %s", diff.PrintWantGot(d))
 	}
 }

pkg/apis/pipeline/v1alpha1/merge_test.go

@@ -20,6 +20,7 @@ import (
 	"testing"
 
 	"github.com/google/go-cmp/cmp"
+	"github.com/tektoncd/pipeline/test/diff"
 	corev1 "k8s.io/api/core/v1"
 	"k8s.io/apimachinery/pkg/api/resource"
 )
@@ -130,7 +131,7 @@ func TestMergeStepsWithStepTemplate(t *testing.T) {
 			}
 
 			if d := cmp.Diff(tc.expected, result, resourceQuantityCmp); d != "" {
-				t.Errorf("merged steps don't match, diff: %s", d)
+				t.Errorf("merged steps don't match, diff: %s", diff.PrintWantGot(d))
 			}
 		})
 	}

pkg/apis/pipeline/v1alpha1/param_types_test.go

@@ -25,6 +25,7 @@ import (
 	"github.com/google/go-cmp/cmp"
 	tb "github.com/tektoncd/pipeline/internal/builder/v1alpha1"
 	"github.com/tektoncd/pipeline/pkg/apis/pipeline/v1alpha1"
+	"github.com/tektoncd/pipeline/test/diff"
 )
 
 func TestParamSpec_SetDefaults(t *testing.T) {
@@ -72,7 +73,7 @@ func TestParamSpec_SetDefaults(t *testing.T) {
 			ctx := context.Background()
 			tc.before.SetDefaults(ctx)
 			if d := cmp.Diff(tc.before, tc.defaultsApplied); d != "" {
-				t.Errorf("ParamSpec.SetDefaults/%s (-want, +got) = %v", tc.name, d)
+				t.Errorf("ParamSpec.SetDefaults/%s %s", tc.name, diff.PrintWantGot(d))
 			}
 		})
 	}
@@ -133,7 +134,7 @@ func TestArrayOrString_ApplyReplacements(t *testing.T) {
 		t.Run(tt.name, func(t *testing.T) {
 			tt.args.input.ApplyReplacements(tt.args.stringReplacements, tt.args.arrayReplacements)
 			if d := cmp.Diff(tt.expectedOutput, tt.args.input); d != "" {
-				t.Errorf("ApplyReplacements() output did not match expected value %s", d)
+				t.Errorf("ApplyReplacements() output did not match expected value %s", diff.PrintWantGot(d))
 			}
 		})
 	}

pkg/apis/pipeline/v1alpha1/pipeline_conversion_test.go

@@ -24,6 +24,7 @@ import (
 	"github.com/google/go-cmp/cmp"
 	"github.com/tektoncd/pipeline/pkg/apis/pipeline/v1beta1"
 	resource "github.com/tektoncd/pipeline/pkg/apis/resource/v1alpha1"
+	"github.com/tektoncd/pipeline/test/diff"
 	corev1 "k8s.io/api/core/v1"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	"knative.dev/pkg/apis"
@@ -170,8 +171,8 @@ func TestPipelineConversion(t *testing.T) {
 					t.Errorf("ConvertFrom() = %v", err)
 				}
 				t.Logf("ConvertFrom() = %#v", got)
-				if diff := cmp.Diff(test.in, got); diff != "" {
-					t.Errorf("roundtrip (-want, +got) = %v", diff)
+				if d := cmp.Diff(test.in, got); d != "" {
+					t.Errorf("roundtrip %s", diff.PrintWantGot(d))
 				}
 			})
 		}

pkg/apis/pipeline/v1alpha1/pipelinerun_conversion_test.go

@@ -23,6 +23,7 @@ import (
 
 	"github.com/google/go-cmp/cmp"
 	"github.com/tektoncd/pipeline/pkg/apis/pipeline/v1beta1"
+	"github.com/tektoncd/pipeline/test/diff"
 	corev1 "k8s.io/api/core/v1"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	"knative.dev/pkg/apis"
@@ -172,8 +173,8 @@ func TestPipelineRunConversion(t *testing.T) {
 					t.Errorf("ConvertFrom() = %v", err)
 				}
 				t.Logf("ConvertFrom() = %#v", got)
-				if diff := cmp.Diff(test.in, got); diff != "" {
-					t.Errorf("roundtrip (-want, +got) = %v", diff)
+				if d := cmp.Diff(test.in, got); d != "" {
+					t.Errorf("roundtrip %s", diff.PrintWantGot(d))
 				}
 			})
 		}

pkg/apis/pipeline/v1alpha1/pipelinerun_defaults_test.go

@@ -26,6 +26,7 @@ import (
 	"github.com/tektoncd/pipeline/pkg/apis/config"
 	"github.com/tektoncd/pipeline/pkg/apis/pipeline/v1alpha1"
 	"github.com/tektoncd/pipeline/pkg/contexts"
+	"github.com/tektoncd/pipeline/test/diff"
 	corev1 "k8s.io/api/core/v1"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	logtesting "knative.dev/pkg/logging/testing"
@@ -88,8 +89,8 @@ func TestPipelineRunSpec_SetDefaults(t *testing.T) {
 			ctx := context.Background()
 			tc.prs.SetDefaults(ctx)
 
-			if diff := cmp.Diff(tc.want, tc.prs); diff != "" {
-				t.Errorf("Mismatch of PipelineRunSpec: %s", diff)
+			if d := cmp.Diff(tc.want, tc.prs); d != "" {
+				t.Errorf("Mismatch of PipelineRunSpec %s", diff.PrintWantGot(d))
 			}
 		})
 	}
@@ -257,8 +258,8 @@ func TestPipelineRunDefaulting(t *testing.T) {
 			}
 			got.SetDefaults(ctx)
 			if !cmp.Equal(got, tc.want, ignoreUnexportedResources) {
-				t.Errorf("SetDefaults (-want, +got) = %v",
-					cmp.Diff(got, tc.want, ignoreUnexportedResources))
+				d := cmp.Diff(got, tc.want, ignoreUnexportedResources)
+				t.Errorf("SetDefaults %s", diff.PrintWantGot(d))
 			}
 		})
 	}

pkg/apis/pipeline/v1alpha1/pipelinerun_types_test.go

@@ -24,6 +24,7 @@ import (
 	"github.com/google/go-cmp/cmp"
 	tb "github.com/tektoncd/pipeline/internal/builder/v1alpha1"
 	"github.com/tektoncd/pipeline/pkg/apis/pipeline/v1alpha1"
+	"github.com/tektoncd/pipeline/test/diff"
 	corev1 "k8s.io/api/core/v1"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	"knative.dev/pkg/apis"
@@ -49,7 +50,7 @@ func TestPipelineRunStatusConditions(t *testing.T) {
 
 	fooStatus := p.Status.GetCondition(foo.Type)
 	if d := cmp.Diff(fooStatus, foo, ignoreVolatileTime); d != "" {
-		t.Errorf("Unexpected pipeline run condition type; want %v got %v; diff %v", fooStatus, foo, d)
+		t.Errorf("Unexpected pipeline run condition type; diff %s", diff.PrintWantGot(d))
 	}
 
 	// Add a second condition.
@@ -58,7 +59,7 @@ func TestPipelineRunStatusConditions(t *testing.T) {
 	barStatus := p.Status.GetCondition(bar.Type)
 
 	if d := cmp.Diff(barStatus, bar, ignoreVolatileTime); d != "" {
-		t.Fatalf("Unexpected pipeline run condition type; want %v got %v; diff %s", barStatus, bar, d)
+		t.Fatalf("Unexpected pipeline run condition type; diff %s", diff.PrintWantGot(d))
 	}
 }
 
@@ -78,7 +79,7 @@ func TestPipelineRun_TaskRunref(t *testing.T) {
 	}
 
 	if d := cmp.Diff(p.GetTaskRunRef(), expectTaskRunRef); d != "" {
-		t.Fatalf("Taskrun reference mismatch; want %v got %v; diff %s", expectTaskRunRef, p.GetTaskRunRef(), d)
+		t.Fatalf("Taskrun reference mismatch; diff %s", diff.PrintWantGot(d))
 	}
 }
 

pkg/apis/pipeline/v1alpha1/pipelinerun_validation_test.go

@@ -23,6 +23,7 @@ import (
 
 	"github.com/google/go-cmp/cmp"
 	"github.com/tektoncd/pipeline/pkg/apis/pipeline/v1alpha1"
+	"github.com/tektoncd/pipeline/test/diff"
 	corev1 "k8s.io/api/core/v1"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	"knative.dev/pkg/apis"
@@ -86,7 +87,7 @@ func TestPipelineRun_Invalidate(t *testing.T) {
 		t.Run(ps.name, func(t *testing.T) {
 			err := ps.pr.Validate(context.Background())
 			if d := cmp.Diff(err.Error(), ps.want.Error()); d != "" {
-				t.Errorf("PipelineRun.Validate/%s (-want, +got) = %v", ps.name, d)
+				t.Errorf("PipelineRun.Validate/%s %s", ps.name, diff.PrintWantGot(d))
 			}
 		})
 	}
@@ -187,7 +188,7 @@ func TestPipelineRunSpec_Invalidate(t *testing.T) {
 		t.Run(ps.name, func(t *testing.T) {
 			err := ps.spec.Validate(context.Background())
 			if d := cmp.Diff(ps.wantErr.Error(), err.Error()); d != "" {
-				t.Errorf("PipelineRunSpec.Validate/%s (-want, +got) = %v", ps.name, d)
+				t.Errorf("PipelineRunSpec.Validate/%s %s", ps.name, diff.PrintWantGot(d))
 			}
 		})
 	}
@@ -213,7 +214,7 @@ func TestPipelineRunSpec_Validate(t *testing.T) {
 	for _, ps := range tests {
 		t.Run(ps.name, func(t *testing.T) {
 			if err := ps.spec.Validate(context.Background()); err != nil {
-				t.Errorf("PipelineRunSpec.Validate/%s (-want, +got) = %v", ps.name, err)
+				t.Errorf("PipelineRunSpec.Validate/%s %v", ps.name, err)
 			}
 		})
 	}

pkg/apis/pipeline/v1alpha1/resource_types_test.go

@@ -19,6 +19,7 @@ import (
 	"github.com/google/go-cmp/cmp"
 	"github.com/tektoncd/pipeline/pkg/apis/pipeline/v1alpha1"
 	"github.com/tektoncd/pipeline/pkg/apis/pipeline/v1beta1"
+	"github.com/tektoncd/pipeline/test/diff"
 	corev1 "k8s.io/api/core/v1"
 )
 
@@ -94,7 +95,7 @@ func TestApplyTaskModifier(t *testing.T) {
 			}}
 
 			if d := cmp.Diff(expectedTaskSpec, tc.ts); d != "" {
-				t.Errorf("TaskSpec was not modified as expected (-want, +got): %s", d)
+				t.Errorf("TaskSpec was not modified as expected %s", diff.PrintWantGot(d))
 			}
 		})
 	}

pkg/apis/pipeline/v1alpha1/step_replacements_test.go

@@ -21,6 +21,7 @@ import (
 
 	"github.com/google/go-cmp/cmp"
 	"github.com/tektoncd/pipeline/pkg/apis/pipeline/v1alpha1"
+	"github.com/tektoncd/pipeline/test/diff"
 	corev1 "k8s.io/api/core/v1"
 )
 
@@ -126,6 +127,6 @@ func TestApplyStepReplacements(t *testing.T) {
 	}
 	v1alpha1.ApplyStepReplacements(&s, replacements, arrayReplacements)
 	if d := cmp.Diff(s, expected); d != "" {
-		t.Errorf("Container replacements failed: %s", d)
+		t.Errorf("Container replacements failed: %s", diff.PrintWantGot(d))
 	}
 }

pkg/apis/pipeline/v1alpha1/task_conversion_test.go

@@ -23,6 +23,7 @@ import (
 	"github.com/google/go-cmp/cmp"
 	"github.com/tektoncd/pipeline/pkg/apis/pipeline/v1beta1"
 	resource "github.com/tektoncd/pipeline/pkg/apis/resource/v1alpha1"
+	"github.com/tektoncd/pipeline/test/diff"
 	corev1 "k8s.io/api/core/v1"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	"knative.dev/pkg/apis"
@@ -176,8 +177,8 @@ func TestTaskConversion(t *testing.T) {
 					t.Errorf("ConvertFrom() = %v", err)
 				}
 				t.Logf("ConvertFrom() = %#v", got)
-				if diff := cmp.Diff(test.in, got); diff != "" {
-					t.Errorf("roundtrip (-want, +got) = %v", diff)
+				if d := cmp.Diff(test.in, got); d != "" {
+					t.Errorf("roundtrip %s", diff.PrintWantGot(d))
 				}
 			})
 		}
@@ -313,8 +314,8 @@ func TestTaskConversionFromDeprecated(t *testing.T) {
 					t.Errorf("ConvertFrom() = %v", err)
 				}
 				t.Logf("ConvertFrom() = %#v", got)
-				if diff := cmp.Diff(test.want, got); diff != "" {
-					t.Errorf("roundtrip (-want, +got) = %v", diff)
+				if d := cmp.Diff(test.want, got); d != "" {
+					t.Errorf("roundtrip %s", diff.PrintWantGot(d))
 				}
 			})
 		}

pkg/apis/pipeline/v1alpha1/task_validation_test.go

@@ -26,6 +26,7 @@ import (
 	"github.com/tektoncd/pipeline/pkg/apis/pipeline/v1alpha1"
 	"github.com/tektoncd/pipeline/pkg/apis/pipeline/v1beta1"
 	resource "github.com/tektoncd/pipeline/pkg/apis/resource/v1alpha1"
+	"github.com/tektoncd/pipeline/test/diff"
 	corev1 "k8s.io/api/core/v1"
 	"knative.dev/pkg/apis"
 )
@@ -1015,7 +1016,7 @@ func TestTaskSpecValidateError(t *testing.T) {
 				t.Fatalf("Expected an error, got nothing for %v", ts)
 			}
 			if d := cmp.Diff(tt.expectedError, *err, cmpopts.IgnoreUnexported(apis.FieldError{})); d != "" {
-				t.Errorf("TaskSpec.Validate() errors diff -want, +got: %v", d)
+				t.Errorf("TaskSpec.Validate() errors diff %s", diff.PrintWantGot(d))
 			}
 		})
 	}