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diff --git a/src/test/java/sevenUnitsGUI/TabbedViewTest.java b/src/test/java/sevenUnitsGUI/TabbedViewTest.java
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+++ b/src/test/java/sevenUnitsGUI/TabbedViewTest.java
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+/**
+ * Copyright (C) 2022 Adrien Hopkins
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+package sevenUnitsGUI;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+import org.junit.jupiter.api.Test;
+
+/**
+ * Test for the TabbedView
+ *
+ * @since v0.4.0
+ * @since 2022-07-17
+ */
+class TabbedViewTest {
+	/**
+	 * @return a view with all settings set to standard values
+	 * 
+	 * @since v0.4.0
+	 * @since 2022-07-17
+	 */
+	private static final TabbedView setupView() {
+		final var view = new TabbedView();
+		final var presenter = view.getPresenter();
+		
+		presenter.setNumberDisplayRule(StandardDisplayRules.uncertaintyBased());
+		presenter.setPrefixRepetitionRule(
+				DefaultPrefixRepetitionRule.NO_RESTRICTION);
+		presenter.setSearchRule(PrefixSearchRule.COMMON_PREFIXES);
+		presenter.setOneWayConversionEnabled(false);
+		presenter.setShowDuplicates(true);
+		
+		return view;
+	}
+	
+	/**
+	 * Simulates an expression conversion operation, and ensures it works
+	 * properly.
+	 * 
+	 * @since v0.4.0
+	 * @since 2022-07-17
+	 */
+	@Test
+	void testExpressionConversion() {
+		final var view = setupView();
+		
+		// prepare for unit conversion
+		view.masterPane.setSelectedIndex(1);
+		view.fromEntry.setText("250.0 inch");
+		view.toEntry.setText("metre");
+		
+		view.convertExpressionButton.doClick();
+		
+		// check result of conversion
+		assertEquals("250.0 inch = 6.350 metre", view.expressionOutput.getText());
+	}
+	
+	/**
+	 * Simulates a unit conversion operation, and ensures it works properly.
+	 * 
+	 * @since v0.4.0
+	 * @since 2022-07-17
+	 */
+	@Test
+	void testUnitConversion() {
+		final var view = setupView();
+		
+		// prepare for unit conversion
+		view.masterPane.setSelectedIndex(0);
+		view.dimensionSelector.setSelectedItem("Length");
+		view.fromSearch.getSearchList().setSelectedValue("inch", true);
+		view.toSearch.getSearchList().setSelectedValue("metre", true);
+		view.valueInput.setText("250.0");
+		
+		view.convertUnitButton.doClick();
+		
+		// check result of conversion
+		assertEquals("250.0 inch = 6.350 metre", view.unitOutput.getText());
+	}
+	
+}