How to use

getTextHistoryCount

method

in

org.robolectric.shadows.ShadowCanvas

@Test
public void resetCanvasHistory_shouldClearTheHistoryAndDescription() throws Exception {
 Canvas canvas = new Canvas();
 canvas.drawPath(new Path(), new Paint());
 canvas.drawText("hi", 1, 2, new Paint());
 ShadowCanvas shadow = shadowOf(canvas);
 shadow.resetCanvasHistory();
 assertThat(shadow.getPathPaintHistoryCount()).isEqualTo(0);
 assertThat(shadow.getTextHistoryCount()).isEqualTo(0);
 assertEquals("", shadow.getDescription());
}

@Test
public void shouldRecordText_charSequenceOverload() throws Exception {
 Canvas canvas = new Canvas();
 Paint paint = new Paint();
 paint.setColor(1);
 // StringBuilder implements CharSequence:
 canvas.drawText(new StringBuilder("hello"), 1, 4, 1f, 2f, paint);
 ShadowCanvas shadowCanvas = shadowOf(canvas);
 assertThat(shadowCanvas.getTextHistoryCount()).isEqualTo(1);
 assertEquals(1f, shadowCanvas.getDrawnTextEvent(0).x, 0);
 assertEquals(2f, shadowCanvas.getDrawnTextEvent(0).y, 0);
 assertEquals(paint, shadowCanvas.getDrawnTextEvent(0).paint);
 assertEquals("ell", shadowCanvas.getDrawnTextEvent(0).text);
}

@Test
public void shouldRecordText_charArrayOverload() throws Exception {
 Canvas canvas = new Canvas();
 Paint paint = new Paint();
 paint.setColor(1);
 canvas.drawText(new char[]{'h', 'e', 'l', 'l', 'o'}, 2, 3, 1f, 2f, paint);
 ShadowCanvas shadowCanvas = shadowOf(canvas);
 assertThat(shadowCanvas.getTextHistoryCount()).isEqualTo(1);
 assertEquals(1f, shadowCanvas.getDrawnTextEvent(0).x, 0);
 assertEquals(2f, shadowCanvas.getDrawnTextEvent(0).y, 0);
 assertEquals(paint, shadowCanvas.getDrawnTextEvent(0).paint);
 assertEquals("llo", shadowCanvas.getDrawnTextEvent(0).text);
}

@Test
public void shouldRecordText_stringWithRangeOverload() throws Exception {
 Canvas canvas = new Canvas();
 Paint paint = new Paint();
 paint.setColor(1);
 canvas.drawText("hello", 1, 4, 1f, 2f, paint);
 ShadowCanvas shadowCanvas = shadowOf(canvas);
 assertThat(shadowCanvas.getTextHistoryCount()).isEqualTo(1);
 assertEquals(1f, shadowCanvas.getDrawnTextEvent(0).x, 0);
 assertEquals(2f, shadowCanvas.getDrawnTextEvent(0).y, 0);
 assertEquals(paint, shadowCanvas.getDrawnTextEvent(0).paint);
 assertEquals("ell", shadowCanvas.getDrawnTextEvent(0).text);
}

@Test
public void shouldRecordText() throws Exception {
 Canvas canvas = new Canvas();
 Paint paint = new Paint();
 Paint paint2 = new Paint();
 paint.setColor(1);
 paint2.setColor(5);
 canvas.drawText("hello", 1, 2, paint);
 canvas.drawText("hello 2", 4, 6, paint2);
 ShadowCanvas shadowCanvas = shadowOf(canvas);
 assertThat(shadowCanvas.getTextHistoryCount()).isEqualTo(2);
 assertEquals(1f, shadowCanvas.getDrawnTextEvent(0).x, 0);
 assertEquals(2f, shadowCanvas.getDrawnTextEvent(0).y, 0);
 assertEquals(4f, shadowCanvas.getDrawnTextEvent(1).x, 0);
 assertEquals(6f, shadowCanvas.getDrawnTextEvent(1).y, 0);
 assertEquals(paint, shadowCanvas.getDrawnTextEvent(0).paint);
 assertEquals(paint2, shadowCanvas.getDrawnTextEvent(1).paint);
 assertEquals("hello", shadowCanvas.getDrawnTextEvent(0).text);
 assertEquals("hello 2", shadowCanvas.getDrawnTextEvent(1).text);
}