Consumers only draw power when all other required inputs are valid

tests/src/test/java/power/DirectConsumerTests.java

@@ -0,0 +1,57 @@
+package power;
+
+import io.anuke.mindustry.content.Items;
+import io.anuke.mindustry.content.UnitTypes;
+import io.anuke.mindustry.type.ItemStack;
+import io.anuke.mindustry.world.Tile;
+import io.anuke.mindustry.world.blocks.power.PowerGenerator;
+import io.anuke.mindustry.world.blocks.power.PowerGraph;
+import io.anuke.mindustry.world.blocks.units.UnitFactory;
+import org.junit.jupiter.api.Test;
+import sun.nio.cs.Surrogate;
+
+import static org.junit.jupiter.api.Assertions.assertTrue;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+/** Tests for direct power consumers. */
+public class DirectConsumerTests extends PowerTestFixture{
+
+    @Test
+    void noPowerRequestedWithNoItems(){
+        testUnitFactory(0, 0, 0.08f, 0.08f, 0.0f);
+    }
+
+    @Test
+    void noPowerRequestedWithInsufficientItems(){
+        testUnitFactory(30, 0, 0.08f, 0.08f, 0.0f);
+        testUnitFactory(0, 30, 0.08f, 0.08f, 0.0f);
+    }
+
+    @Test
+    void powerRequestedWithSufficientItems(){
+        testUnitFactory(30, 30, 0.08f, 0.08f, 1.0f);
+    }
+
+    void testUnitFactory(int siliconAmount, int leadAmount, float producedPower, float requestedPower, float expectedSatisfaction){
+        Tile consumerTile = createFakeTile(0, 0, new UnitFactory("fakefactory"){{
+            type = UnitTypes.spirit;
+            produceTime = 60;
+            consumes.powerDirect(requestedPower);
+            consumes.items(new ItemStack(Items.silicon, 30), new ItemStack(Items.lead, 30));
+        }});
+        consumerTile.entity.items.add(Items.silicon, siliconAmount);
+        consumerTile.entity.items.add(Items.lead, leadAmount);
+
+        Tile producerTile = createFakeTile(2, 0, createFakeProducerBlock(producedPower));
+        producerTile.<PowerGenerator.GeneratorEntity>entity().productionEfficiency = 0.5f; // 100%
+
+        PowerGraph graph = new PowerGraph();
+        graph.add(producerTile);
+        graph.add(consumerTile);
+
+        consumerTile.entity.update();
+        graph.update();
+
+        assertEquals(expectedSatisfaction, consumerTile.entity.power.satisfaction);
+    }
+}