Litmus (Apache Calcite API)

```
public interface Litmus
```
Callback to be called when a test for validity succeeds or fails.

Field Summary

Fields
Modifier and Type	Field	Description
`static Litmus`	`IGNORE`	Implementation of `Litmus` that returns a status code but does not throw.
`static Litmus`	`THROW`	Implementation of `Litmus` that throws an `AssertionError` on failure.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`boolean`	`check(boolean condition, java.lang.String message, java.lang.Object... args)`	Checks a condition.
`boolean`	`fail(java.lang.String message, java.lang.Object... args)`	Called when test fails.
`boolean`	`succeed()`	Called when test succeeds.

- Field Detail
  - THROW
```
static final Litmus THROW
```
    Implementation of Litmus that throws an AssertionError on failure.
  - IGNORE
```
static final Litmus IGNORE
```
    Implementation of Litmus that returns a status code but does not throw.
- Method Detail
  - fail
```
boolean fail(java.lang.String message,
             java.lang.Object... args)
```
    Called when test fails. Returns false or throws.
    
    Parameters:
    
    message - Message
    
    args - Arguments
  - succeed
```
boolean succeed()
```
    Called when test succeeds. Returns true.
  - check
```
boolean check(boolean condition,
              java.lang.String message,
              java.lang.Object... args)
```
    Checks a condition.
    If the condition is true, calls succeed(); if the condition is false, calls fail(java.lang.String, java.lang.Object...), converting info into a string message.