diff --git a/src/fr/iut/uca/Operations.java b/src/fr/iut/uca/Operations.java
index b29545c..309df2b 100644
--- a/src/fr/iut/uca/Operations.java
+++ b/src/fr/iut/uca/Operations.java
@@ -48,7 +48,7 @@ public class Operations {
 	
 	public boolean pythagoras(long a, long b, long c) {
 		if(a <= 0 || b <= 0 || c <= 0) {
-			throw new ArithmeticException("there is no such thing as a negative length for a triangle's side");
+			throw new ArithmeticException("there is no such thing as a negative length");
 		}
 		
 		return (
diff --git a/src/fr/iut/uca/PleaseEclipseCmon.java b/src/fr/iut/uca/PleaseEclipseCmon.java
deleted file mode 100644
index c699a20..0000000
--- a/src/fr/iut/uca/PleaseEclipseCmon.java
+++ /dev/null
@@ -1,10 +0,0 @@
-package fr.iut.uca;
-
-public class PleaseEclipseCmon {
-
-	public static void main(String[] args) {
-	
-		Operations operation = new Operations();
-		System.out.println(operation.add(2, 2, 2, 2, 3));
-	}
-}
diff --git a/src/test/OperationsTests.java b/src/test/OperationsTests.java
index 2f9c6cd..0debb1b 100644
--- a/src/test/OperationsTests.java
+++ b/src/test/OperationsTests.java
@@ -8,6 +8,8 @@ import java.util.Random;
 import org.junit.jupiter.api.BeforeAll;
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.ArgumentsSource;
 
 import fr.iut.uca.Operations;
 
@@ -331,7 +333,6 @@ class OperationsTests {
 	
 	@Test
 	void multRdmEquals() {
-		Random rdm = new Random();
 		
 		for(int i = 0 ; i <10; i++) {
 			// Arrange
@@ -339,7 +340,7 @@ class OperationsTests {
 			long rdmX = rdm.nextLong();
 			long rdmY = rdm.nextLong();
 		
-			long expected;
+			long expected = 0;
 		
 			if(rdmX == 1) {
 				expected = rdmY;
@@ -524,9 +525,90 @@ class OperationsTests {
 		assertEquals(expected, actual);
 	}
 	
+	@Test
+	void divRdmEquals() {
+		
+		for(int i = 0 ; i <10; i++) {
+			// Arrange
+		
+			long rdmX = rdm.nextLong();
+			long rdmY = rdm.nextLong();
+		
+			long expected = 0;
+		
+			if(rdmX == rdmY) {
+				expected = 1;
+			} else if(rdmY == 1) {
+				expected = rdmX;
+			} else if(rdmX == 0) {
+				expected = 0;
+			} else if(rdmY == 0) {
+				rdmY = 42; // keeping it simple but avoiding x/0
+			} else {
+				expected = rdmX / rdmY;
+			}
+		
+			// Act
+		
+			long actual = op.divide(rdmX, rdmY, null);
+		
+			// Assert
+		
+			assertEquals(expected, actual);
+		}
+	}
+	
+	@Test
+	void divRdmIntervals() {
+		
+		for(int i = 0 ; i < 10 ; i++) {
+			// Arrange
+			
+			long rdmX = rdm.nextLong();
+			long rdmY = rdm.nextLong();
+			if(rdmY == 0) { rdmY = 42; } // keeping it simple but avoiding x/0
+		
+			// Act
+		
+			long actual = op.divide(rdmX, rdmY, null);
+		
+			// Assert
+		
+			if((rdmX > 0 && rdmY > 0)
+					|| (rdmX < 0 && rdmY < 0)) {
+					assertTrue(actual >= 0);
+				} else {
+					assertTrue(actual <= 0);
+				} 
+		}
+	}
+	
 	// --------------
 	// pythagoras
 	// --------------
 	
+	@ParameterizedTest
+	@ArgumentsSource(pythBasicArgumentsProvider.class)
+	void pythBasic(long x, long y, long z) {
+		assertTrue(op.pythagoras(x, y, z));
+	}
+	
+	@ParameterizedTest
+	@ArgumentsSource(pythNegArgumentsProvider.class)
+	void pythNeg(long x, long y, long z) {
+		Exception exc = assertThrows(ArithmeticException.class, () -> {
+			op.pythagoras(x, y, z);
+		});
+		
+		assertEquals(exc.getMessage(), "there is no such thing as a negative length");
+	}
+	
+	@ParameterizedTest
+	@ArgumentsSource(pythNonRectArgumentsProvider.class)
+	void pythNonRect(long x, long y, long z) {
+		assertFalse(op.pythagoras(x, y, z));
+	}
+	
+	//TODO add math seed
 	
 }
diff --git a/src/test/pythBasicArgumentsProvider.java b/src/test/pythBasicArgumentsProvider.java
new file mode 100644
index 0000000..bbf7a33
--- /dev/null
+++ b/src/test/pythBasicArgumentsProvider.java
@@ -0,0 +1,23 @@
+package test;
+
+import java.util.stream.Stream;
+
+import org.junit.jupiter.api.extension.ExtensionContext;
+import org.junit.jupiter.params.provider.Arguments;
+import org.junit.jupiter.params.provider.ArgumentsProvider;
+
+class pythBasicArgumentsProvider implements ArgumentsProvider  {
+
+	@Override
+	public Stream<? extends Arguments> provideArguments(ExtensionContext context) throws Exception {
+		return Stream.of(
+				Arguments.of(3, 4, 5),
+				Arguments.of(3, 5, 4),
+				Arguments.of(4, 3, 5),
+				Arguments.of(4, 5, 3),
+				Arguments.of(5, 3, 4),
+				Arguments.of(5, 4, 3)
+				);
+	}
+
+}
diff --git a/src/test/pythNegArgumentsProvider.java b/src/test/pythNegArgumentsProvider.java
new file mode 100644
index 0000000..fdb13b4
--- /dev/null
+++ b/src/test/pythNegArgumentsProvider.java
@@ -0,0 +1,22 @@
+package test;
+
+import java.util.stream.Stream;
+
+import org.junit.jupiter.api.extension.ExtensionContext;
+import org.junit.jupiter.params.provider.Arguments;
+import org.junit.jupiter.params.provider.ArgumentsProvider;
+
+class pythNegArgumentsProvider implements ArgumentsProvider {
+
+	@Override
+	public Stream<? extends Arguments> provideArguments(ExtensionContext context) throws Exception {
+		return Stream.of(
+				Arguments.of(0, 4, 5),
+				Arguments.of(3, 0, 4),
+				Arguments.of(4, 3, 0),
+				Arguments.of(-1, 5, 3),
+				Arguments.of(5, -1, 4),
+				Arguments.of(5, 4, -1)
+				);
+	}
+}
diff --git a/src/test/pythNonRectArgumentsProvider.java b/src/test/pythNonRectArgumentsProvider.java
new file mode 100644
index 0000000..e775346
--- /dev/null
+++ b/src/test/pythNonRectArgumentsProvider.java
@@ -0,0 +1,20 @@
+package test;
+
+import java.util.stream.Stream;
+
+import org.junit.jupiter.api.extension.ExtensionContext;
+import org.junit.jupiter.params.provider.Arguments;
+import org.junit.jupiter.params.provider.ArgumentsProvider;
+
+class pythNonRectArgumentsProvider implements ArgumentsProvider {
+
+	@Override
+	public Stream<? extends Arguments> provideArguments(ExtensionContext context) throws Exception {
+		return Stream.of(
+				Arguments.of(Long.MAX_VALUE, Long.MAX_VALUE, Long.MAX_VALUE),
+				Arguments.of(1, 1, 1),
+				Arguments.of(5, 6, 10)
+				);
+	}
+
+}