Update jasmine tests

spec/pab/pab_chute.spec.ts

@@ -25,4 +25,16 @@ describe("Class PabChute: ", () => {
     pabChuteTest("Z2", 0.5);
     pabChuteTest("DH", 1.5);
 
+    it ("Z1 < Z2 should lead to log error entry", () => {
+        const prms = new PabChuteParams(
+            100,      // Cote amont Z1
+            100.5,    // Cote aval Z2
+            1.5,      // Chute DH
+        );
+
+        const nub = new PabChute(prms);
+
+        expect(nub.Calc("DH", 0).log.messages.length).toBeGreaterThan(0);
+    });
+
 });

spec/pab/pab_nombre.spec.ts

@@ -53,7 +53,7 @@ describe("Class PabNombre: ", () => {
         expect(nub.result.getExtraResult("DHR")).toBe(0);
     });
 
-    it ("non-integer number of basins should throw an error", () => {
+    it ("non-integer number of basins should lead to log error entry", () => {
         const prms = new PabNombreParams(
             3,      // Chute totale DHT
             4.5,    // Nombre de bassins N

src/pab/pab_chute.ts

@@ -3,6 +3,7 @@ import { Nub } from "../nub";
 import { ParamCalculability, ParamDefinition, ParamFamily } from "../param/param-definition";
 import { ParamDomainValue } from "../param/param-domain";
 import { ParamsEquation } from "../param/params-equation";
+import { Message, MessageCode } from "../util/message";
 import { Result } from "../util/result";
 
 export class PabChuteParams extends ParamsEquation {
@@ -60,6 +61,13 @@ export class PabChute extends Nub {
     public Equation(sVarCalc: string): Result {
         let v: number;
 
+        if (! [ "Z1", "Z2" ].includes(sVarCalc) && this.prms.Z1.singleValue <= this.prms.Z2.singleValue) {
+            const m = new Message(MessageCode.ERROR_ELEVATION_ZI_LOWER_THAN_Z2);
+            m.extraVar.Z1 = this.prms.Z1.singleValue;
+            m.extraVar.Z2 = this.prms.Z2.singleValue;
+            return new Result(m);
+        }
+
         switch (sVarCalc) {
             case "Z1":
                 v = this.prms.Z2.v + this.prms.DH.v;

src/util/message.ts

@@ -43,6 +43,11 @@ export enum MessageCode {
      */
     ERROR_DICHO_FUNCTION_VARIATION,
 
+    /**
+     * la cote amont Z1 est plus basse que la cote aval Z2
+     */
+    ERROR_ELEVATION_ZI_LOWER_THAN_Z2,
+
     /**
      * les bornes de l'intervalle d'un ParamDomain sont incorrectes
      */