panic_test.go

     1  // Copyright 2020 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 runtime_test
     6  
     7  import (
     8  	"strings"
     9  	"testing"
    10  )
    11  
    12  // Test that panics print out the underlying value
    13  // when the underlying kind is directly printable.
    14  // Issue: https://golang.org/issues/37531
    15  func TestPanicWithDirectlyPrintableCustomTypes(t *testing.T) {
    16  	tests := []struct {
    17  		name            string
    18  		wantPanicPrefix string
    19  	}{
    20  		{"panicCustomBool", `panic: main.MyBool(true)`},
    21  		{"panicCustomComplex128", `panic: main.MyComplex128(32.1+10i)`},
    22  		{"panicCustomComplex64", `panic: main.MyComplex64(0.11+3i)`},
    23  		{"panicCustomFloat32", `panic: main.MyFloat32(-93.7)`},
    24  		{"panicCustomFloat64", `panic: main.MyFloat64(-93.7)`},
    25  		{"panicCustomInt", `panic: main.MyInt(93)`},
    26  		{"panicCustomInt8", `panic: main.MyInt8(93)`},
    27  		{"panicCustomInt16", `panic: main.MyInt16(93)`},
    28  		{"panicCustomInt32", `panic: main.MyInt32(93)`},
    29  		{"panicCustomInt64", `panic: main.MyInt64(93)`},
    30  		{"panicCustomString", `panic: main.MyString("Panic` + "\n\t" + `line two")`},
    31  		{"panicCustomUint", `panic: main.MyUint(93)`},
    32  		{"panicCustomUint8", `panic: main.MyUint8(93)`},
    33  		{"panicCustomUint16", `panic: main.MyUint16(93)`},
    34  		{"panicCustomUint32", `panic: main.MyUint32(93)`},
    35  		{"panicCustomUint64", `panic: main.MyUint64(93)`},
    36  		{"panicCustomUintptr", `panic: main.MyUintptr(93)`},
    37  		{"panicDeferFatal", "panic: runtime.errorString(\"invalid memory address or nil pointer dereference\")\n\tfatal error: sync: unlock of unlocked mutex"},
    38  		{"panicDoublieDeferFatal", "panic: runtime.errorString(\"invalid memory address or nil pointer dereference\") [recovered, repanicked]\n\tfatal error: sync: unlock of unlocked mutex"},
    39  	}
    40  
    41  	for _, tt := range tests {
    42  		t := t
    43  		t.Run(tt.name, func(t *testing.T) {
    44  			output := runTestProg(t, "testprog", tt.name)
    45  			if !strings.HasPrefix(output, tt.wantPanicPrefix) {
    46  				t.Fatalf("%q\nis not present in\n%s", tt.wantPanicPrefix, output)
    47  			}
    48  		})
    49  	}
    50  }
    51
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