github.com/markusbkk/elvish@v0.0.0-20231204143114-91dc52438621/pkg/eval/errs/errs_test.go (about)

     1  package errs
     2  
     3  import (
     4  	"testing"
     5  )
     6  
     7  var errorMessageTests = []struct {
     8  	err     error
     9  	wantMsg string
    10  }{
    11  	{
    12  		OutOfRange{What: "list index here", ValidLow: "0", ValidHigh: "2", Actual: "3"},
    13  		"out of range: list index here must be from 0 to 2, but is 3",
    14  	},
    15  	{
    16  		OutOfRange{What: "list index here", ValidLow: "1", ValidHigh: "0", Actual: "0"},
    17  		"out of range: list index here has no valid value, but is 0",
    18  	},
    19  	{
    20  		BadValue{What: "command", Valid: "callable", Actual: "number"},
    21  		"bad value: command must be callable, but is number",
    22  	},
    23  	{
    24  		ArityMismatch{What: "arguments", ValidLow: 2, ValidHigh: 2, Actual: 3},
    25  		"arity mismatch: arguments must be 2 values, but is 3 values",
    26  	},
    27  	{
    28  		ArityMismatch{What: "arguments", ValidLow: 2, ValidHigh: -1, Actual: 1},
    29  		"arity mismatch: arguments must be 2 or more values, but is 1 value",
    30  	},
    31  	{
    32  		ArityMismatch{What: "arguments", ValidLow: 2, ValidHigh: 3, Actual: 1},
    33  		"arity mismatch: arguments must be 2 to 3 values, but is 1 value",
    34  	},
    35  	{
    36  		SetReadOnlyVar{VarName: "x"},
    37  		"cannot set read-only variable $x",
    38  	},
    39  	{
    40  		ReaderGone{},
    41  		"reader gone",
    42  	},
    43  }
    44  
    45  func TestErrorMessages(t *testing.T) {
    46  	for _, test := range errorMessageTests {
    47  		if gotMsg := test.err.Error(); gotMsg != test.wantMsg {
    48  			t.Errorf("got message %v, want %v", gotMsg, test.wantMsg)
    49  		}
    50  	}
    51  }