public void FormatHandlesFormatException()
{
using (TestHostContext hc = new TestHostContext(this))
{
Tracing trace = hc.GetTrace();
// Arrange.
var variableSets = new[]
{
new { Format = "Bad format { 0}", Args = null as object[], Expected = "Bad format { 0}" },
new { Format = "Bad format { 0}", Args = new object[0], Expected = "Bad format { 0} " },
new { Format = "Bad format { 0}", Args = new object[] { null }, Expected = "Bad format { 0} " },
new { Format = "Bad format { 0}", Args = new object[] { 123, 456 }, Expected = "Bad format { 0} 123, 456" },
};
foreach (var variableSet in variableSets)
{
trace.Info($"{nameof(variableSet)}:");
trace.Info(variableSet);
// Act.
string actual = StringUtil.Format(variableSet.Format, variableSet.Args);
// Assert.
Assert.Equal(variableSet.Expected, actual);
}
}
}
public void FormatAlwaysCallsFormat()
{
using (TestHostContext hc = new TestHostContext(this))
{
Tracing trace = hc.GetTrace();
// Arrange.
var variableSets = new[]
{
new { Format = null as string, Args = null as object[], Expected = string.Empty },
new { Format = null as string, Args = new object[0], Expected = string.Empty },
new { Format = null as string, Args = new object[] { 123 }, Expected = string.Empty },
new { Format = "Some message", Args = null as object[], Expected = "Some message" },
new { Format = "Some message", Args = new object[0], Expected = "Some message" },
new { Format = "Some message", Args = new object[] { 123 }, Expected = "Some message" },
new { Format = "Some format '{0}'", Args = null as object[], Expected = "Some format ''" },
new { Format = "Some format '{0}'", Args = new object[0], Expected = "Some format ''" },
new { Format = "Some format '{0}'", Args = new object[] { 123 }, Expected = "Some format '123'" },
};
foreach (var variableSet in variableSets)
{
trace.Info($"{nameof(variableSet)}:");
trace.Info(variableSet);
// Act.
string actual = StringUtil.Format(variableSet.Format, variableSet.Args);
// Assert.
Assert.Equal(variableSet.Expected, actual);
}
}
}
