  We present a general method for testing gamma-ray burst (GRB) jet structure
and carry out a comprehensive analysis about the prevalent jet structure
models. According to the jet angular energy distribution, we can not only
derive the expected distribution of the GRB isotropic-equivalent energy release
for any possible jet structure, but also obtain a two-dimensional distribution
including redshift z. By using the Kolmogorov-Smirnov test we compare the
predicted distribution with the observed sample, and find that the power-law
structured jet model is most consistent with the current sample and that the
uniform jet model is also plausible. However, this conclusion is tentative
because of the small size and the inhomogeneity of this sample. Future
observations (e.g., Swift) will provide a larger and less biased sample for us
to make a robust conclusion by using the procedure proposed in this paper.
