Question

Android Studio 3.2。

在我的xml中，我使用ConstraintLayout

<TextView
            android:id="@+id/baseTextView"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_margin="@dimen/default_margin"
            android:layout_marginEnd="@dimen/half_default_margin"
            android:text="@string/base"
            android:textSize="@dimen/text_view_text_size"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="@+id/jsonViewToolBar" />

        <com.google.android.material.textfield.TextInputEditText
            android:id="@+id/baseTextInputEditText"
            style="@style/textViewOneLine"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:textSize="@dimen/edit_text_text_size"
            app:layout_constraintEnd_toEndOf="@+id/baseTextView"
            app:layout_constraintStart_toStartOf="@+id/baseTextView"
app:layout_constraintTop_toBottomOf="@+id/baseTextView" />



<style name="textViewOneLine">
        <item name="android:ellipsize">end</item>
        <item name="android:maxLines">1</item>
        <item name="android:singleLine">true</item>
    </style>

您会看到TextView和TextInputEditText还有剩余的空白边 = @dimen/default_margin。现在，我需要编写Espresso测试以检查baseTextView和baseTextInputEditText的边距@dimen/default_margin

@Test
    fun baseTextViewMarginStart() {
        onView(withId(R.id.baseTextView)).check(matches(withMarginResId(CustomMatchers.Indent.START, R.dimen.default_margin)));
}

 @Test
    fun baseTextInputEditTextMarginStart() {
        onView(withId(R.id.baseTextInputEditText)).check(matches(withMarginResId(CustomMatchers.Indent.START, R.dimen.default_margin)));
    }

这是我的自定义匹配器

  fun withMarginResId(indent: Indent, expectedResourceId: Int): Matcher<View> {
        return object : BoundedMatcher<View, View>(View::class.java) {
            private var expectedValueDp: Float = 0.toFloat()

            override fun matchesSafely(view: View): Boolean {
                expectedValueDp = AndroidUtil.getDimensionDp(view.getContext(), expectedResourceId)
                val actualValueDp = getActualMarginDp(view, indent)
                return java.lang.Float.compare(actualValueDp, expectedValueDp) == 0
            }

            override fun describeTo(description: Description) {
                description.appendText("with margin(dp): ")
                description.appendValue(expectedResourceId)
            }
        }
    }


 public static float getDimensionDp(Context context, int dimenResourceId) {
        float dimenDp = (context.getResources().getDimension(dimenResourceId) / context.getResources().getDisplayMetrics().density);
        return dimenDp;
    }

第一次测试是通过，但是第二次测试是失败。

为什么？

Espresso：测试第二个小部件失败（ConstraintLayout）

0 个答案: