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Include magnification state graph in unit test javadoc

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The graph seems helpful for understaning magnification states.

Test: render graph with `dot`, ensure it looks ok
Change-Id: I40c5ab36ca9123b1a85c63ba2208532b6c97a997
This commit is contained in:
Eugene Susla
2018-01-03 14:02:57 -08:00
parent dd312ababe
commit fcf5acd6f2
1 changed files with 28 additions and 0 deletions
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28
services/tests/servicestests/src/com/android/server/accessibility/MagnificationGestureHandlerTest.java
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@@ -48,6 +48,34 @@ import org.junit.runner.RunWith;
import java.util.function.IntConsumer;
/**
* Tests the state transitions of {@link MagnificationGestureHandler}
*
* Here's a dot graph describing the transitions being tested:
* {@code
* digraph {
* IDLE -> SHORTCUT_TRIGGERED [label="a11y\nbtn"]
* SHORTCUT_TRIGGERED -> IDLE [label="a11y\nbtn"]
* IDLE -> DOUBLE_TAP [label="2tap"]
* DOUBLE_TAP -> IDLE [label="timeout"]
* DOUBLE_TAP -> TRIPLE_TAP_AND_HOLD [label="down"]
* SHORTCUT_TRIGGERED -> TRIPLE_TAP_AND_HOLD [label="down"]
* TRIPLE_TAP_AND_HOLD -> ZOOMED [label="up"]
* TRIPLE_TAP_AND_HOLD -> DRAGGING_TMP [label="hold/\nswipe"]
* DRAGGING_TMP -> IDLE [label="release"]
* ZOOMED -> ZOOMED_DOUBLE_TAP [label="2tap"]
* ZOOMED_DOUBLE_TAP -> ZOOMED [label="timeout"]
* ZOOMED_DOUBLE_TAP -> DRAGGING [label="hold"]
* ZOOMED_DOUBLE_TAP -> IDLE [label="tap"]
* DRAGGING -> ZOOMED [label="release"]
* ZOOMED -> IDLE [label="a11y\nbtn"]
* ZOOMED -> PANNING [label="2hold"]
* PANNING -> PANNING_SCALING [label="pinch"]
* PANNING_SCALING -> ZOOMED [label="release"]
* PANNING -> ZOOMED [label="release"]
* }
* }
*/
@RunWith(AndroidJUnit4.class)
public class MagnificationGestureHandlerTest {