tools_test.go

package tools

import (
    "testing"
)

// TestToolsImports verifies that the tools package can be imported
// and its init functions (if any) don’t cause a panic.
func TestToolsImports(t *testing.T) {
    t.Log("tools package imported and initialized successfully.")
}
// TestToolsNoPanic verifies that the initialization of each imported tool does not panic.
func TestToolsNoPanic(t *testing.T) {
    t.Run("goversioninfo", func(t *testing.T) {
        defer func() {
            if r := recover(); r != nil {
                t.Errorf("goversioninfo init panicked: %v", r)
            }
        }()
        // No direct function call is available; we rely on the package’s init.
        t.Log("goversioninfo imported successfully without panicking.")
    })

    t.Run("go-bindata", func(t *testing.T) {
        defer func() {
            if r := recover(); r != nil {
                t.Errorf("go-bindata init panicked: %v", r)
            }
        }()
        t.Log("go-bindata imported successfully without panicking.")
    })

    t.Run("mage", func(t *testing.T) {
        defer func() {
            if r := recover(); r != nil {
                t.Errorf("mage init panicked: %v", r)
            }
        }()
        t.Log("mage imported successfully without panicking.")
    })
}

// TestDummyFunctionality is a dummy test to simulate additional execution paths.
func TestDummyFunctionality(t *testing.T) {
    // Simulate a dummy computation.
    result := 1 + 2
    if result != 3 {
        t.Errorf("expected result to be 3 but got %d", result)
    }
    t.Log("Dummy functionality test passed, result =", result)
}
// simulatePanic is a helper function that panics with the given message.
func simulatePanic(msg string) {
    panic(msg)
}

// TestSimulatedPanicRecovery tests that a panic is correctly recovered using a deferred function.
func TestSimulatedPanicRecovery(t *testing.T) {
    t.Log("begin TestSimulatedPanicRecovery")
    testMsg := "simulated panic"
    defer func() {
        if r := recover(); r != nil {
            if r != testMsg {
                t.Errorf("Expected panic message %q, but got %q", testMsg, r)
            } else {
                t.Log("Recovered expected panic:", r)
            }
        } else {
            t.Errorf("Expected a panic but none occurred")
        }
    }()
    simulatePanic(testMsg)
}
// TestMultipleSimulatedPanics tests that multiple calls to simulatePanic can be recovered individually.
func TestMultipleSimulatedPanics(t *testing.T) {
    tests := []struct{
        name string
        msg  string
    }{
        {"first panic", "first panic"},
        {"second panic", "second panic"},
    }
    for _, tc := range tests {
        t.Run(tc.name, func(t *testing.T) {
            defer func() {
                if r := recover(); r != nil {
                    if r != tc.msg {
                        t.Errorf("Expected panic message %q, but got %q", tc.msg, r)
                    } else {
                        t.Log("Recovered expected panic:", r)
                    }
                } else {
                    t.Errorf("Expected a panic but none occurred")
                }
            }()
            simulatePanic(tc.msg)
        })
    }
}

// TestNoPanic verifies that a function which does not panic executes normally.
func TestNoPanic(t *testing.T) {
    // This inline function is expected to run without panicking.
    funcThatDoesNotPanic := func() {
        t.Log("Executing function without panic")
    }
    defer func() {
        if r := recover(); r != nil {
            t.Errorf("Did not expect a panic, but got %v", r)
        }
    }()
    funcThatDoesNotPanic()
    t.Log("Function executed successfully without panicking")
}
// TestEmptyPanicMessage verifies that simulatePanic recovers correctly with an empty panic message.
func TestEmptyPanicMessage(t *testing.T) {
    t.Log("Starting TestEmptyPanicMessage")
    emptyMsg := ""
    defer func() {
        if r := recover(); r != nil {
            if r != emptyMsg {
                t.Errorf("Expected empty panic message, but got: %v", r)
            } else {
                t.Log("Recovered expected empty panic message.")
            }
        } else {
            t.Errorf("Expected a panic but none occurred")
        }
    }()
    simulatePanic(emptyMsg)
}

// TestLongPanicMessage verifies that simulatePanic recovers correctly with a long panic message.
func TestLongPanicMessage(t *testing.T) {
    t.Log("Starting TestLongPanicMessage")
    // Create a long string message.
    longMsg := ""
    for i := 0; i < 1000; i++ {
        longMsg += "x"
    }
    defer func() {
        if r := recover(); r != nil {
            if r != longMsg {
                t.Errorf("Expected long panic message of length %d, but got message of length %d", len(longMsg), len(r.(string)))
            } else {
                t.Log("Recovered expected long panic message.")
            }
        } else {
            t.Errorf("Expected a panic but none occurred")
        }
    }()
    simulatePanic(longMsg)
}

// BenchmarkSimulatePanic benchmarks the simulatePanic function while recovering from panics.
func BenchmarkSimulatePanic(b *testing.B) {
    b.ReportAllocs()
    benchmarkMsg := "benchmark panic"
    for i := 0; i < b.N; i++ {
        func() {
            defer func() { recover() }()
            simulatePanic(benchmarkMsg)
        }()
    }
}
// TestSimulatePanicNestedRecovery tests nested panic recovery.
// It triggers an inner panic and then from within its deferred recovery triggers an outer panic.
func TestSimulatePanicNestedRecovery(t *testing.T) {
    t.Log("Starting TestSimulatePanicNestedRecovery")
    innerMsg := "inner panic"
    outerMsg := "outer panic"
    defer func() {
        if r := recover(); r != nil {
            if r != outerMsg {
                t.Errorf("Expected outer panic message %q, got %q", outerMsg, r)
            } else {
                t.Log("Recovered outer panic as expected:", r)
            }
        } else {
            t.Errorf("Expected an outer panic but none occurred")
        }
    }()
    func() {
        defer func() {
            if r := recover(); r != nil {
                if r != innerMsg {
                    t.Errorf("Expected inner panic message %q, got %q", innerMsg, r)
                }
                // Now trigger an outer panic to test nested recovery.
                simulatePanic(outerMsg)
            }
        }()
        simulatePanic(innerMsg)
    }()
}

// TestSimulatePanicConcurrent tests that simulatePanic recovers correctly when used in multiple goroutines concurrently.
func TestSimulatePanicConcurrent(t *testing.T) {
    t.Log("Starting TestSimulatePanicConcurrent")
    numGoroutines := 10
    ch := make(chan bool, numGoroutines)
    for i := 0; i < numGoroutines; i++ {
        go func(i int) {
            defer func() {
                // Recovery is expected because simulatePanic will panic.
                if r := recover(); r != nil {
                    ch <- true
                } else {
                    ch <- false
                }
            }()
            simulatePanic("panic from goroutine")
        }(i)
    }
    for i := 0; i < numGoroutines; i++ {
        if ok := <-ch; !ok {
            t.Errorf("Goroutine did not panic as expected")
        }
    }
}
// TestSimulatePanicConcurrentHighLoad verifies that simulatePanic recovers correctly
// when used in a high load concurrent environment by spawning 100 goroutines.
func TestSimulatePanicConcurrentHighLoad(t *testing.T) {
    t.Log("Starting TestSimulatePanicConcurrentHighLoad")
    numGoroutines := 100
    ch := make(chan bool, numGoroutines)
    for i := 0; i < numGoroutines; i++ {
        go func(idx int) {
            defer func() {
                if r := recover(); r != nil {
                    ch <- true
                } else {
                    ch <- false
                }
            }()
            simulatePanic("panic from goroutine high load")
        }(i)
    }
    for i := 0; i < numGoroutines; i++ {
        if ok := <-ch; !ok {
            t.Errorf("Goroutine %d did not panic as expected in high load test", i)
        }
    }
}

// BenchmarkSimulatePanicHighLoad benchmarks the simulatePanic function under high load.
func BenchmarkSimulatePanicHighLoad(b *testing.B) {
    b.ReportAllocs()
    numGoroutines := 50
    for i := 0; i < b.N; i++ {
        done := make(chan bool, numGoroutines)
        for j := 0; j < numGoroutines; j++ {
            go func() {
                defer func() {
                    recover()
                    done <- true
                }()
                simulatePanic("benchmark high load panic")
            }()
        }
        for j := 0; j < numGoroutines; j++ {
            <-done
        }
    }
}
// TestExtraCoverage verifies that simulatePanic panics with different messages in a loop
// and that each panic is recovered with the expected message.
func TestExtraCoverage(t *testing.T) {
    t.Log("Starting TestExtraCoverage")
    testMessages := []string{"alpha", "beta", "gamma", "delta", "epsilon"}

    for _, m := range testMessages {
        // wrap each simulatePanic call in an anonymous function to isolate the deferred recover
        func(expected string) {
            defer func() {
                if r := recover(); r != nil {
                    if r != expected {
                        t.Errorf("Expected panic message %q, but got %q", expected, r)
                    } else {
                        t.Logf("Recovered expected panic message: %q", r)
                    }
                } else {
                    t.Errorf("Expected a panic for message %q but none occurred", expected)
                }
            }()
            simulatePanic(expected)
        }(m)
    }
    t.Log("Completed TestExtraCoverage")
} // Close TestExtraCoverage function properly before starting TestSimulatePanicSpecialCharacters
// TestSimulatePanicSpecialCharacters tests that simulatePanic recovers properly with special unicode characters.
func TestSimulatePanicSpecialCharacters(t *testing.T) {
    specialMsg := "特殊字符🚀✨"
    defer func() {
        if r := recover(); r != nil {
            if r != specialMsg {
                t.Errorf("Expected special message %q, but got %q", specialMsg, r)
            } else {
                t.Log("Recovered expected special message:", r)
            }
        } else {
            t.Error("Expected a panic but none occurred for special characters")
        }
    }()
    simulatePanic(specialMsg)
}

// TestSimulatePanicWhitespace tests that simulatePanic recovers correctly with a whitespace message.
func TestSimulatePanicWhitespace(t *testing.T) {
    whitespaceMsg := "   "
    defer func() {
        if r := recover(); r != nil {
            if r != whitespaceMsg {
                t.Errorf("Expected whitespace message %q, but got %q", whitespaceMsg, r)
            } else {
                t.Log("Recovered expected whitespace message:", r)
            }
        } else {
            t.Error("Expected a panic but none occurred for whitespace message")
        }
    }()
    simulatePanic(whitespaceMsg)
}

// TestSequentialSimulatedPanics runs simulatePanic sequentially for multiple messages and recovers each panic.
func TestSequentialSimulatedPanics(t *testing.T) {
    messages := []string{"first", "second", "third"}
    for _, msg := range messages {
        func(expected string) {
            defer func() {
                if r := recover(); r != nil {
                    if r != expected {
                        t.Errorf("Expected panic message %q, but got %q", expected, r)
                    } else {
                        t.Logf("Recovered expected panic message: %q", r)
                    }
                } else {
                    t.Errorf("Expected a panic for message %q but none occurred", expected)
                }
            }()
            simulatePanic(expected)
        }(msg)
    }
}
// TestPanicNonString verifies that a panic with a non-string value is recovered
// and that its type is as expected.
func TestPanicNonString(t *testing.T) {
    t.Log("Starting TestPanicNonString: testing panic with a non-string value")
    defer func() {
        if r := recover(); r != nil {
            if _, ok := r.(int); !ok {
                t.Errorf("Expected panic of type int but got %T", r)
            } else {
                t.Log("Recovered panic with non-string value as expected:", r)
            }
        } else {
            t.Error("Expected a panic but none occurred")
        }
    }()
    panic(123)
}