Function TestFormatFormFieldValue

internal/cmdutil/fileupload_test.go:399–429

TestFormatFormFieldValue locks in the fix for the float64 -> scientific notation bug. JSON numbers unmarshal to float64, and fmt's default %v for float64 delegates to %g which switches to scientific notation at ~1e6 (e.g. 1185356 -> "1.185356e+06"). Backends that parse the form field as an integer r

(t *testing.T)

// (e.g. 1185356 -> "1.185356e+06"). Backends that parse the form field as an
// integer reject that, surfacing as a generic "params error".
func TestFormatFormFieldValue(t *testing.T) {
	t.Parallel()

	tests := []struct {
		name string
		in   any
		want string
	}{
		{"float64 large integer avoids scientific", float64(1185356), "1185356"},
		{"float64 below scientific threshold", float64(358934), "358934"},
		{"float64 zero", float64(0), "0"},
		{"float64 huge", float64(20 * 1024 * 1024), "20971520"},
		{"float64 negative", float64(-42), "-42"},
		{"float64 fractional preserved", float64(3.14), "3.14"},
		{"string pass-through", "hello", "hello"},
		{"bool true", true, "true"},
		{"int via %v", 42, "42"},
		{"int64 via %v", int64(9007199254740992), "9007199254740992"},
	}

	for _, temp := range tests {
		tt := temp
		t.Run(tt.name, func(t *testing.T) {
			t.Parallel()
			got := formatFormFieldValue(tt.in)
			if got != tt.want {
				t.Fatalf("formatFormFieldValue(%v) = %q, want %q", tt.in, got, tt.want)
			}
		})
	}
}