updating test files

test/test_scripts/structural/test_lambda0_beam_param.py

+# Submitted by Sebastian.
+# Checks that trace data output returns the same beamsize when a different default wavelength is used
+
+from pykat import finesse
+
+kat_code = """
+l laser 1 0 0 n1
+s s1 10 1 n1 n2
+
+m2 mITM 0.9 0.0 0 n2 n3
+attr mITM Rc -2.0
+s scav 1 n3 n4
+m2 mETM 0.9 0.0 0 n4 n5
+attr mETM Rc 2.0
+
+cav myCav mITM n3 mETM n4
+
+s s3 1 n5 n6
+
+pd pd_trans n6
+
+noxaxis
+yaxis abs:deg                                 # move detector frequency with xaxis
+"""
+
+kat = finesse.kat()
+kat.verbose = False
+kat.lambda0 = 1550e-9
+kat.parseKatCode(kat_code)
+kat.maxtem = 0
+kat.trace = 2
+out, T = kat.run(getTraceData=True)
+
+print (out.stdout)
+
+bp = T[0]['n4'][0]
+
+# this is not overwritten to 1550nm as above
+print('beam_param.wavelength: {:.0f}nm'.format(bp.wavelength*1e9))
+# therefore this is wrong
+print('w0 from beam_param.w0: {:.2f}um'.format(bp.w0*1e6))
+# and this does not really work as the wavelength cancels out
+# for z=0 and therefore the waist does not change
+print('w0 from beam_param.beamsize(): {:.2f}um'.format(bp.beamsize(z=0, wavelength=1550e-9)*1e6))
+
+assert(bp.w0 == bp.beamsize(z=0, wavelength=1550e-9))
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